Chemistry and Society Exam 1
Sodium belongs to group number _______ on the periodic table. A) 1 B) 2 C) 7 D) 8
A) 1
Assuming that a mosquito holds 2.2 x 103 µL of blood, how much blood could 5.0 x 106 mosquitos hold, total? A) 1.1 x 1010 µL B) 2.3 x 103 µL C) 4.4x 10-4 µL D) 5.0 x 106 µL
A) 1.1 x 1010 µL
Identify the number of protons and neutrons in an atom of chromium: A) 24 protons, 28 neutrons B) 28 protons, 24 neutrons C) 52 neutrons, 24 protons D) 52 protons, 28 neutrons
A) 24 protons, 28 neutrons
How many neutrons, protons and electrons are in an atom of Eu-153? A) 63 protons, 63 electrons, 90 neutrons B) 153 protons, 63 electrons, 63 neutrons C) 152 electrons, 153 electrons, 63 neutrons D) 90 electrons, 90 protons, 63 neutrons
A) 63 protons, 63 electrons, 90 neutrons
The smallest unit of matter which cannot be broken down except in nuclear reactions is known as: A) An atom B) An element C) Matter D) A molecule
A) An atom
Identify which of the following elements is an alkali metal: A) Cs B) Zn C) Sr D) Mg
A) Cs
Elements with (in) the same ___________ tend to share similar properties. A) Group B) Period C) Row D) Color
A) Group
What is special about the number of electrons that each noble gas contains? A) It is the maximum for a particular energy level. B) It is the minimum for a particular energy level C) Noble gases need to undergo chemical reactions to gain more electrons. D) None of the above
A) It is the maximum for a particular energy level.
Identify the element that contains the following number of protons and neutrons: 36 protons and 48 neutrons. A) Kr B) Cd C) Po D) Mg
A) Kr
Chromium can be classified as a: A) Metal B) Metalloid C) Non metal D) Gas
A) Metal
Choose the element whose valence electrons would be hardest to remove in a chemical reaction: A) Na B) K C) Rb D) Cs
A) Na
The main reason that gold mining is one of the dirtiest mining activities is that: A) Only a few ounces of gold are recovered for each ton of rock mined. B) Many chemicals must be used to extract gold from the earth. C) Gold is only found deep underground. Digging tunnels creates a lot of dirt. D) Gold is only found in remote areas so mining it contributes significantly to emission of carbon dioxide because of the distances that miners must travel.
A) Only a few ounces of gold are recovered for each ton of rock mined.
Isotopes of which element were used to determine the source of the marble used in the Parthenon? A) Oxygen B) Carbon C) Chlorine D) Calcium
A) Oxygen
Organize these elements from least number of protons to most: chromium, magnesium, arsenic, oxygen A) Oxygen, magnesium, chromium, arsenic B) Magnesium, chromium, arsenic, oxygen C) Oxygen, arsenic, chromium, magnesium D) Arsenic, chromium, oxygen, magnesium
A) Oxygen, magnesium, chromium, arsenic
Which of the following ions would be unlikely to exist, based on the octet rule? A) S^3- B) Mg^2+ C) Ca^2+ D) Na^1+ E) F
A) S^3-
Write the name and symbol for the element with atomic number 51 is: A) Sb, antimony B) Pd, palladium C) Ce, cerium D) Mg, magnesium
A) Sb, antimony
When a substance in the solid phase jumps directly to the gas phase the process is known as: A) Sublimation B) Vaporization C) Condensation D) Melting
A) Sublimation
The name of the element whose atomic number is 22 is: A) Titanium B) Sodium C) Neon D) Tin
A) Titanium
What is the purpose of a model in chemistry? A) To represent nature in a way that is easier to see or understand B) To make something that is normally small much larger C) To create something that can be drawn on paper D) To make something that can be modified using computer software
A) To represent nature in a way that is easier to see or understand
Choose the false statement: A) When determining the number of valence electrons in an element in Period 4 or below, we include the transition elements. B) The noble gases are the most stable family on the periodic table C) The first energy level contains two electrons D) As you go from left to right across the periodic table, each element has one more proton and one more electron than the element before it.
A) When determining the number of valence electrons in an element in Period 4 or below, we include the transition elements.
Locard's principle states that: A) When two things come into contact there is always a transfer of material from one object to another. B) When an atom is energized it always emits light C) Dog hair always sticks to corduroy pants D) A chemical reaction emits less energy than a nuclear reaction E) None of the above
A) When two things come into contact there is always a transfer of material from one object to another.
Which is the largest? A) 1000 L B) 1.0 x 108 mL C) 1.0 x 1010 μL D) 1.0 x 1012 nL
B) 1.0 x 108 mL
Express the following value in scientific notation: 0.000145 A) 145 x 10^3 B) 1.45 x 10^-4 C) 1.5 x 10^5 D) 14.5 x 10^-4
B) 1.45 x 10^-4
. The value 345606000000 expressed using scientific notation would contain what value in the exponential part? A) 10^6 B) 10^11 C) 10^-11 D) 10^-7
B) 10^11
At the time your textbook was written, there were _____________ known different elements. A) 58 B) 114 C) 2125 D) 6.02 x 1023
B) 114
How many core electrons and how many valence electrons do atoms of Se possess? A) 18 core and 16 valence B) 28 core and 6 valence C) 26 core and 8 valence D) 79 core and 34 valence
B) 28 core and 6 valence
Which of these values represents the smallest number? A) 4.2 x 10^-4 B) 7.6 x 10^-6 C) 1.2 x 10^-2 D) 3.3 x 10^-3
B) 7.6 x 10^-6
. The maximum number of electrons that can exist in the second energy level is: A) 2 B) 8 C) 10 D) 18
B) 8
Assuming that there are 25 steps between each level of a skyscraper and 35 floors in the skyscraper, how many steps are there in the building, total? A) 60 steps B) 875 steps C) 49 steps D) 25 steps
B) 875 steps
The law of constant composition states that__________________________. A) The number of atoms in a compound only changes when the compound changes state. B) A given compound has a fixed and definite number of atoms of each of its constituent elements. C) Compounds react with each other in whole unit ratios. D) The composition of a compound will be the same before and after a reaction.
B) A given compound has a fixed and definite number of atoms of each of its constituent elements.
Which one is chemical change? A) A puddle freezing B) A marshmallow turning brown when roasted C) The alcohol in a bottle of rubbing alcohol disappearing when the lid is not put on after use D) Ice on the sidewalk melting after salt has been sprinkled on it
B) A marshmallow turning brown when roasted
Who was the first person to have a part of his/her body X-rayed? A) Marie Curie B) Anna Rontgen C) Dmitri Mendeleev D) Bertha Wilhelm
B) Anna Rontgen
In the natureBox for Chapter One, it was reported that NASA scientists had discovered a bacterium that could survive on what unusual material? A) Phosphorus B) Arsenic C) Gasoline D) Cytoplasm
B) Arsenic
Scientific notation is used frequently in chemistry because: A) Scientists prefer to write numbers this way because they are easier to enter into a calculator. B) Atoms and molecules are very small. Scientific notation makes it easier to refer to things that are very large or small. C) It is required in order to submit papers to international journals. D) It allows for the use of significant figures.
B) Atoms and molecules are very small. Scientific notation makes it easier to refer to things that are very large or small.
Which type of visible light would have the shortest wavelength light? A) Yellow B) Blue C) Red D) Green
B) Blue
Which one of the following is not a characteristic of metals? A) Malleable B) Brittle C) Ductile D) Good electrical conductors
B) Brittle
Which of the following is classified as a compound? A) He B) CO2 C) Au D) O2
B) CO2
Which of the following elements will form a cation? A) Ne B) Ca C) N D) O E) Cl
B) Ca
Write the formula for the salt that forms from following pair of elements: calcium (Ca) and chlorine (Cl) A) CaCl B) CaCl2 C) Ca2Cl D) Ca2Cl2
B) CaCl2
Organic substances will always contain what element? A) Iron B) Carbon C) Tin D) Chlorine E) Lead
B) Carbon
Following the step in which a scientist runs experiments and analyzes data, he or she is ready to: A) Create a hypothesis B) Develop a theory C) Make observations D) Perform additional experiments
B) Develop a theory
An "EMR blocker" blocks: A) Electrons making rays B) Electromagnetic radiation C) Exceptional magnetic responses D) Extraneous machine relays
B) Electromagnetic radiation
Identify the transition metal: A) Cs B) Fe C) As D) N E) H
B) Fe
What is the name of the element that contains 31 protons? A) Antimony B) Gallium C) Phosphorus D) Germanium
B) Gallium
On the periodic table, vertical columns are called: A) Periods B) Groups or families C) Sets D) Metals
B) Groups or families
A control experiment is one: A) That is repeated at least three times B) In which most of the variables are tightly controlled so that the effect of changing one variable can be determined C) That is tightly sealed and not exposed to oxygen so that the effect of oxygen on the experimental variables can be determined D) That produces an "xy" plot
B) In which most of the variables are tightly controlled so that the effect of changing one variable can be determined
If an atom obeys the octet rule it means that: A) It has a total of 8 electrons. B) It has 8 valence electrons. C) It has 8 protons. D) It has 8 particles in the nucleus.
B) It has 8 valence electrons.
A value is expressed using scientific notation. The exponential part is written as 10-6. What is true about this value? A) It is 60 times larger than one B) It is a million times smaller than one C) It is a million times larger than one D) It is 60 times smaller than one
B) It is a million times smaller than one
The abbreviation for the metric prefix Mega is: A) Mg B) M C) Ma D) None of these
B) M
As can be classified as a: A) Metal B) Metalloid C) Non metal D) Gas
B) Metalloid
The base unit for length is: A) Mole B) Meter C) Gram D) Liter
B) Meter
How does gold mining pollute local waterways? A) The large volume of dirt that is left behind clogs nearby waterways. B) Mining runoff contains toxic chemicals such as arsenic, which can contaminate nearby lakes and rivers. C) Heavy metals from the mining process sink to the bottom of streams and rivers, killing off wildlife. D) Local rivers are dammed to provide water for the mining process. This upsets the local plant and animal life.
B) Mining runoff contains toxic chemicals such as arsenic, which can contaminate nearby lakes and rivers.
An oxygen ion will have the same number of electrons as which of the following noble gases? A) He B) Ne C) Ar D) Kr E) Xe
B) Ne
Isotopes of an element differ in the number of __________ that they contain. A) Electrons B) Neutrons C) Protons D) Atoms
B) Neutrons
The element that has 76 protons in its nucleus is called: A) Arsenic B) Osmium C) Thallium D) Hafnium
B) Osmium
An atom of phosphorus would be most likely gain or lose electrons to become a________ ion. A) P^5- B) P^3- C) P^3+ D) P^4-
B) P^3-
An element is defined by the number of ________ it contains. A) Electrons B) Protons C) Neutrons D) Nuclei
B) Protons
The atomic number of an element is equal to the number of ________ that element contains. A) Electrons B) Protons C) Neutrons D) Isotopes
B) Protons
Which is defined as the emission of energy? A) Beta particles B) Radiation C) Electron smear D) X-rays
B) Radiation
Some think that clothing embedded with silver is unsafe because: A) Silver is a heavy metal that can be toxic after long periods of exposure. B) Silver from the clothing can make its way to natural waters where it can cause mutations in fish. C) Silver can become volatile when released into the air. This type of silver has many effects on human health. D) The clothing breaks down easily and can release mutated bacteria and fungi into the environment.
B) Silver from the clothing can make its way to natural waters where it can cause mutations in fish.
In order to kill bacteria and fungi, clothing is often embedded with: A) Finely ground, combusted charcoal B) Silver nanoparticles C) Buckyballs D) Neoprene
B) Silver nanoparticles
A standard is: A) A measurement that has been taken 3 or more times B) Something for which a particular characteristic is known very precisely C) A particular measurement subtracted from the average of all measurements D) Found by repeating a certain experiment multiple times
B) Something for which a particular characteristic is known very precisely
The driving force that causes atoms to reach with one another is the desire for an increase in ______. A) The number of electrons B) Stability C) The size of the atom D) Metallic property of the atom
B) Stability
Gold makes up a very small percentage (0.0000004%) of the earth's crust. Why, if gold has been mined for centuries, is 40% of the gold still present in the crust? A) Only in recent years have humans been able to successfully extract gold from the crust. Previously, only gold blends were removed from the crust. B) The earth's crust has a very large mass. A lot of gold has been removed, but a lot remains. C) Gold is easily recycled, so very little gold is mined each year. D) It is too expensive to mine gold.
B) The earth's crust has a very large mass. A lot of gold has been removed, but a lot remains.
Which family of elements doesn't react easily with other elements? A) The halogens B) The noble gases C) The alkali metals D) The alkali earth metals E) The transition metals
B) The noble gases
Which statement is false? A) The nucleus contains the protons and neutrons. B) The number of neutrons in an element is found by subtracting the number of protons from the atomic mass listed under each symbol on the periodic table. C) The number of electrons in a neutral atom will be equal to the number of protons. D) The neutron is located in the nucleus and it takes up very little space inside the nucleus Neutrons and protons have about the same mass.
B) The number of neutrons in an element is found by subtracting the number of protons from the atomic mass listed under each symbol on the periodic table.
Choose the true statement. A) The core electrons in an atom are the ones that participate in chemical reactions. B) The valence electrons in an atom are more reactive than the core electrons. C) Each energy level holds 8 electrons. D) The least stable family is the family of noble gases.
B) The valence electrons in an atom are more reactive than the core electrons.
The outermost electrons of an atom, the ones that participate in chemical reactions, are called _______ electrons. A) Core B) Valence C) Stable D) Reactive E) Shell
B) Valence
The full name for the following Metric prefix of (GB) A) Gallonbig B) gigabyte C) giganticbyte D) greatbig
B) gigabyte
A terabyte is: A) 0.000000000001 times larger than a byte B) 1,000,000,000,000 times smaller than a byte C) 1,000,000,000,000 times larger than a byte D) 12 times larger than a byte
C) 1,000,000,000,000 times larger than a byte
How many grams are in one kilogram? A) 1,000,000 B) 0.001 C) 1000 D) 10
C) 1000
How many atoms of carbon are in the following compound? CH3(CH2)12COOH A) 12 B) 13 C) 14 D) 16
C) 14
Although the nucleus takes up a very small portion of the volume of an atom, each particle in the nucleus is about _________ times more massive than an electron. A) 10 B) 100 C) 2000 D) 5 million
C) 2000
If it takes Jake 3.1 minutes to read a page in a novel, how many hours will it take him to read a 432-page novel, assuming he doesn't take any breaks? A) 1.3 x 103 hours B) 7.2 hours C) 22 hours D) 1.4 x 102 hours
C) 22 hours
Convert the following value to a number that is not written in scientific notation: 2.3 x 106 A) 23 B) 23000000 C) 2300000 D) 0.0000023
C) 2300000
How many core electrons and how many valence electrons do atoms of Sr possess? A) 38 core and 87 valence B) 32 core and 8 valence C) 36 core and 2 valence D) 18 core and 20 valence
C) 36 core and 2 valence
How many dots would be placed around the Si symbol in its Lewis Dot structure? A) 1 B) 2 C) 4 D) 6
C) 4
Which of the following represents the largest number? A) 5.5 x 10^-5 B) 9.6 x 10^-6 C) 4.2 x 10^-2 D) 1.1 x 10^-15
C) 4.2 x 10^-2
Write the following in decimal format: 4.6 x 10^4 A) 460000 B) 4000 C) 46000 D) 4006
C) 46000
A neutral atom containing 8 protons will contain how many electrons? A) 2 B) 4 C) 8 D) 16
C) 8
All of the elements after atomic number______ are artificial and do not exist in nature. A) 57 B) 89 C) 92 D) 104
C) 92
An aerosol is: A) A pure substance B) A compound C) A mixture D) Another state of matter
C) A mixture
Which of the following could be classified as a homogeneous mixture? A) A glass of Coca-Cola (the substance in the glass, not the glass itself) B) Chunky salsa C) A pat of butter D) A spoonful of mint chocolate chip ice cream
C) A pat of butter
Another name for an ionic compound is: A) A diatomic compound B) A polyatomic ion C) A salt D) A nonmetal E) None of these
C) A salt
If the diameter of an atom is likened to the distance between San Francisco and Washington D.C. the size of the nucleus of this atom would be equivalent to: A) The state of Rhode Island B) The city of Denver C) A store in Kansas D) A hair on the head of a person in Illinois
C) A store in Kansas
In order for the silver particles that are embedded in clothing to work, they must be "activated." What is necessary to do this? A) Heat B) Acid C) Air D) Lemon juice
C) Air
A hypothesis is: A) A set of experiments that are performed B) A detailed explanation of experimental results C) An initial best guess about some observation concerning nature D) A close scrutiny of data obtained during the course of experimentation
C) An initial best guess about some observation concerning nature
47 Measurements that are close to one another but not close to the true value are said to: A) Be accurate B) Be close to the standard C) Be precise D) Have a lot of significant figures
C) Be precise
Identify the alkaline earth metal: A) Na B) Zn C) Ca D) C E) Cl
C) Ca
Which one of the following pairs of elements would be most likely to share similar properties? A) N and F B) B and Si C) Cl and Br D) Br and Kr E) Li and Be
C) Cl and Br
When a substance goes from the gas phase to the liquid phase this process is known as: A) Sublimation B) Vaporization C) Condensation D) Melting
C) Condensation
Which of the following would not be classified as a scientific hypothesis? A) Tea is sweeter when made by using aspartame in place of sugar B) A person can lose weight more quickly by combining exercise and calorie restriction than by calorie restriction alone C) Dogs are better pets than cats D) Grass fed beef has a lower fat content than beef produced from feed lot cows
C) Dogs are better pets than cats
A negatively charged particle located in the cloud like smear of negative charge of an atom is called a(n): A) Proton B) Nucleus C) Electron D) Neutron
C) Electron
As you move from left to right across the periodic table, each element has one more ________ than the element before it. A) Family B) Atom C) Electron D) Neutron E) Energy level
C) Electron
Which of the following is classified as an element? A) CH4 B) H2O C) F2 D) NH3
C) F2
In which of the following bonds are electrons NOT shared? A) Nonpolar covalent bonds B) Polar covalent bonds C) Ionic bonds D) Metallic bonds
C) Ionic bonds
Choose the heterogeneous mixture from the list below: A) Hot black coffee B) Vanilla ice cream C) Lasagna D) A brass ring
C) Lasagna
How many electrons will calcium gain or lose to obtain a noble gas configuration of electrons? A) Gain 16 B) Lose 12 C) Lose 2 D) Gain 4
C) Lose 2
The atomic symbol for the element sodium is: A) S B) So C) Na D) Dm
C) Na
Would the evaporation of water from a mixture of salt water be considered a chemical change? A) Yes, since the water is separating chemically from the salt B) Perhaps. It would depend if the salt changed color once all the water was gone. C) No, since the water is just changing phases, this is simply a physical change. D) Yes, since they would each have different properties once they were separated
C) No, since the water is just changing phases, this is simply a physical change.
Which of the following can break down atoms? A) Chemical reactions B) Radiation C) Nuclear means D) Exposure to X-rays
C) Nuclear means
On the periodic table, horizontal rows are called: A) Families B) Groups C) Periods D) Cousins
C) Periods
Jim weighs himself on his personal scale 4 different times. The values he obtains are 155 pounds, 154 pounds, 155.5 pounds and 155 pounds. On his doctor's scale he weighed 168 pounds. Based on these results we can say that his personal scale is: A) Accurate and precise B) Accurate but not precise C) Precise but not accurate D) Neither accurate nor precise
C) Precise but not accurate
Which of the following would be considered a physical change? A) The metabolism of food B) An apple turning brown when left on the counter C) Solid dry ice making "smoke" D) A chain rusting
C) Solid dry ice making "smoke"
What determines how far from the ground state an electron will jump when energy is added to an atom? A) The size of the atom B) The number of electrons in the atom C) The amount of energy added to the atom D) The number of atoms in a certain sample
C) The amount of energy added to the atom
. In which phase of matter are the atoms or molecules the furthest from each other? A) The liquid phase B) The solid phase C) The gas phase D) They are equidistant in each phase
C) The gas phase
In an atom, which particles are most likely to participate in chemical reactions? A) The protons B) The core electrons C) The valence electrons D) The neutrons
C) The valence electrons
Which of the following types of electromagnetic radiation is the most energetic? A) Radio waves B) Visible light C) Ultraviolet light D) Infrared light
C) Ultraviolet light
Which of the following elements is a noble gas? A) Br2 B) O2 C) Xe D) I2 E) H2
C) Xe
How many electrons does a neutral atom of phosphorus contain? A) 3 B) 30 C) 31 D) 15
D) 15
A neutral atom of sulfur will contain how many electrons? A) 32 B) 6 C) 15 D) 16
D) 16
How many electrons can the third energy level hold, maximum? A) 2 B) 8 C) 10 D) 18 E) 32
D) 18
If there are 35,000,000,000, 000 butterflies in the sky, how many moles of butterflies are in the sky? A) 2.1 x 1037 moles of butterflies B) 2.4 x 1023 moles of butterflies C) 1.7 x 1010 moles of butterflies D) 5.8 x 10-11 moles of butterflies
D) 5.8 x 10-11 moles of butterflies
How many atoms of oxygen are in the following compound? Ca3(PO4)2 A) 2 B) 4 C) 6 D) 8
D) 8
Which ONE of the following is the correct way to represent this value in scientific notation? 960,000,000,000 A) 96 x 10^9 B) 9.6 x 10^9 C) 0.96 x 10^9 D) 9.6 x 10^11
D) 9.6 x 10^11
Write the formula for the salt that forms from following pair of elements: aluminum(Al) and bromine (Br) A) Al3Br B) AlBr2 C) AlBr D) AlBr3
D) AlBr3
________ matter is attracted to or repelled by other matter. A) Heavy B) Microscopic C) Isotopic D) Charged
D) Charged
Identify the element that contains the following number of protons and neutrons: 29 protons and 35 neutrons A) I B) Br C) Gd D) Cu
D) Cu
The scientist credited with bringing the Metric system to Russia was: A) Marie Curie B) Wilhelm Rontgen C) Anna Bertha D) Dmitri Mendeleev
D) Dmitri Mendeleev
The distribution of __________ in an atom determines the stability of that atom. A) Protons B) Physical properties C) Neutrons D) Electrons
D) Electrons
How many electrons will nitrogen gain or lose to obtain a noble gas configuration of electrons? A) Gain 4 B) Lose 5 C) Lose 7 D) Gain 3
D) Gain 3
Cl can be classified as a: A) Metal B) Metalloid C) Non metal D) Gas
D) Gas
Based on the events that followed a tsunami near Japan which severely damaged the Fukishima power plant on March 11, 2011 the country of __________ decided to permanently close all its nuclear power plants by the year 2022. A) France B) Japan C) United States D Germany
D) Germany
Which element is the only element to contain only one proton? A) Helium B) Carbon C) Neon D) Hydrogen
D) Hydrogen
Identify the halogen: A) K B) Ni C) Pb D) I E) Ne
D) I
A bond between calcium and iodine would be: A) Nonpolar covalent B) Polar covalent C) Metallic D) Ionic
D) Ionic
Soils that are reddish in color tend to be high in what element? A) Calcium B) Sodium C) Chlorine D) Iron
D) Iron
Write the formula for the salt that forms from following pair of elements: potassium (K) and nitrogen(N). A) KN B) KN3 C) K2N D) K3N
D) K3N
Which one is NOT a purpose of the peer review process? A) Repeating experiments that were carried out B) Commenting on an article submitted for publication C) Scrutinizing data that was obtained D) Making sure that an article gets published in other languages
D) Making sure that an article gets published in other languages
Which statement is false? A) A theory can be rejected by experimental results that do not support it B) Peer reviewers read an article that a scientist has written and provide feedback to the author C) The first step of the scientific method is setting up hypothesis D) No answer (i.e. all options are true)
D) No answer (i.e. all options are true)
Which element is present in the greatest quantity in soil? A) Carbon B) Iron C) Calcium D) Oxygen E) Bromine
D) Oxygen
A certain atom has 10 core electrons and 5 valence electrons. Identify the element. A) O B) N C) S D) P
D) P
Choose the element whose valence electrons would be easiest to remove in a chemical reaction: A) O B) Se C) S D) Te
D) Te
A dumbbell at a gym in Denver weighs 12 pounds. Which statement is true? A) The dumbbell will weigh the same on Mars B) The dumbbell will have less mass on Mars C) The dumbbell will have more mass on Mars D) The dumbbell will weigh less on Mars
D) The dumbbell will weigh less on Mars
Which one of these would contain the least mass? A) A nanogram B) a Gigagram C) a microgram D) a femtogram
D) a femtogram
The abbreviation for nanograms is best represented as: A) nag B) pg C) Pg D) ng E) µg
D) ng
How many electrons can the fourth energy level hold, maximum? A) 2 B) 8 C) 10 D) 18 E) 32
E) 32
Based on the definition of a pure substance given in your book, which of the following could be classified as pure substances? A) The air you breathe B) The water from a water fountain C) A milkshake D) Chicken noodle soup E) A diamond
E) A diamond
Which of the following elements will form an anion? A) Na B) He C) Zn D) Pb E) Br
E) Br
