Chemistry Midterm Quizziz
What charge will a Beryllium ion have?
2+
What charge will an ion of sulfur have?
2-
The attendance for the basketball game was estimated to be 15,000 people but 12,500 people attended. What was the percent error?
20%
What is the molar mass of B2(CO3)3
201.468 g/mol
What is the mass of one mole of aluminum?
26.982 g
How many sig figs are in 0.0340 m?
3
What is the "L" quantum number for an f orbital?
3
What charge will an aluminum ion have?
3+
What Group is likely to react with the Halogens (Group 17) so that they can have a full valence shell of 8 electrons?
Alkali Metals (Group 1)
Group 1 on the periodic table is known as
Alkali metals
John Dalton wrote postulates to make the idea of the atom useful. Which postulate below was proven wrong?
All elements are made up of tiny indivisible particles called atoms.
Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?
Aufbau's Principle
What atom is represented by 35 protons, 45 neutrons, and 35 electrons?
Bromine
What is this element? [Ar] 4s^2
Calcium
Which of the following will have a lower ionization energy than Scandium (Sc)?
Calcium (Ca)
Which is a halogen
Chlorine
Which has the greater EN?
Cl
Who stated that all atoms of the same element are exactly alike?
Dalton
What do atoms of metals tend to do with their valence electrons when bonding with non-metals?
Donate them
This is a negatively charged particle found outside the nucleus
Electron
Which scientist conducted experiments using alpha particles and thin gold foil, which later helped him develop his model for the atom?
Ernest Rutherford
Which has the greater EN:
F
Some atoms are large enough to see with your eyes.
False
Which element is the least electronegative?
Phosphrous (P)
What does the nucleus of an atom contain?
Protons and neutrons
The temperature of the room is decreasing by 4 degrees Celsius.
Quantitive
Which class of electromagnetic radiation has the least energy?
Radio
Which class of electromagnetic radiation has the longest wavelengths?
Radio
The atom with the largest atomic radius in Group 18 is -
Rn
Which of the following will have a larger radius than Zinc?
Strontium
As you move down the periodic table atoms get bigger. This is because _______
The atoms have more energy levels.
Group 2 on the periodic table is known as
alkaline earth metals
All matter is made of what?
atoms
Souring milk is an example of a
chemical change
Physical properties of a substance include _______
color, odor and weight; density and specific gravity; melting point, boiling point and hardness
J.J. Thomson provided evidence that an atom...
contains negatively charged particles
Which physical property of matter describes the relationship between mass and volume?
density
Energy of a photon is ________ proportional to frequency.
directly
Contributes basically no mass to an atom.
electrons
Valence electrons are
electrons farthest from the nucleus
The lines in the emission spectrum for hydrogen are formed from _________.
energy given off when the electron moves from higher energy levels to lower energy levels
What are the units for molar mass?
grams/mole
Each column in the periodic table is called a
group
Elements in a _______ have similar chemical properties.
group
Atoms that have a high electronegativity, __________.
hold on to their electrons more tightly
Electronegativity is...
how good an atom is at attracting atoms
Ionization energy is...
how much energy it takes to remove an electron from an atom
This contains most of the mass of an atom
nucleus
The atomic number tells you what?
number of protons
A horizontal row of elements in the periodic table
period
Is melting butter for popcorn a chemical or physical change?
physical
The mass of a lead cube is 64 grams. This is an example of
physical extensive property
The melting point of ice is 0C. This is an example of ________.
physical intensive property
This particle is found in the nucleus and has a positive charge
proton
What determines the identity of the atom?
protons
For an atom to be electrically neutral, it must contain the same number of ______
protons and electrons
All of the mold samples have grown this week.
qualitative
Trey is the fastest runner in the class!
qualitative
What is the shape of an s orbital?
sphere
As you move across the periodic table atoms tend to get smaller because, _________.
the atoms have more protons
What is an atom?
the basic particle from which all elements are made
The photoelectric effect helps us to understand
the particle nature of light
The atomic number for Oxygen is 8, so
there are 8 protons in the atom
Rutherford's gold foil experiment provided evidence that
there is a dense positively charged nucleus at the center of an atom.
An atom's overall charge is __________.
neutral
Alkaline Earth Metals have how many valence electrons?
2
How many electrons can occupy any one orbital?
2
How many electrons can the first energy level hold?
2
How many sig figs in the number 5.1 x 10^5?
2
How many valence electrons are in an atom of Ba?
2
Elements that are soft, extremely reactive metals are part of what group?
Alkali Metals
This particle is found in the nucleus and has no charge
neutron
At _______ degrees Celsius water freezes into a solid.
0
If n = 2, then "l" can equal
0 and 1
If quantum number "n" = 3, what are the possible values for "L"
0,1,2
Round 0.010229 to four sig figs
0.01023
For a p sublevel, "L" equals ______
1
How many valence electrons does hydrogen have?
1
How many valence electrons does sodium have?
1
The Alkali metals have ______ valence electron
1
Diamond has a density of 3.26 g/cm^3. What is the mass of a diamond that has a volume of 0.35 cm^3?
1.1 g
How many molecules are in 2.5 mol of NaCl?
1.51x10^24
How many protons are in an atom of magnesium?
12
Calculate: 10.010 + 2.31
12.32
How many neutrons does uranium - 235 have?
143
The students measured length during a science experiment, they got 12cm. But the actual measurement was 14.25cm. What was the percent error?
15.79%
Which electron configuration belongs to Chlorine (Cl)?
1s^2 2s^2 2p^6 3s^2 3p^5
What charge will an ion of nitrogen have?
3-
What is the molar mass of NaOH?
39.997 g/mol
How many valence electrons does carbon have?
4
The density of this material is 2g/cm^3. There are 24cm^3 Find the total mass.
48g
What is the correct representation for an orbital which has an "n" value of 4 and an "l" value of 2?
4d
How many neutrons does the isotope of lithium have?
5
How many orbitals are there in the "d" sublevel?
5
How many valence electrons are in an atom of P?
5
You know that 12 inches = 1 foot. Convert 60 inches to feet.
5 feet
Convert 5cm to mm:
50mm
How many minutes are in a year?
525,600 min
You know 16 cups = 1 gallon. Convert 3.5 gallons into cups.
56 cups
What is the molar mass of table sat (NaCl)
58.443 g/mol
How many sig figs in the number 100.010?
6
How many valence electrons does Sulfur have?
6
How many valence electrons does oxygen have?
6
What is the mass of 1.2 moles of 1rl3?
690 g
Jack has a rock. The rock has a mass of 14g and a volume of 2cm^3. What is the density of the rock?
7g/cm^3
For a principle quantum number, "n", equal to 2, what is the total electron capacity of that level?
8
How many neutrons in C-14?
8
How many valence electrons are in an atom of Ar?
8
Convert 8 kilometers to meters
8,000 meters
Convert from meters to cm: 9 meters
900 cm
How close a measurement is to the true value is called...
Accuracy
Who was awarded the nobel prize for his work on the photoelectric effect?
Albert Einstein
Which atom has the largest atomic radius?
Francium
Nonmetals ________ electrons when they become ions.
Gain
What atom matches this electron configuration? [Xe] 6s^2 4f^14 5d^9
Gold
How did Rutherford discover the proton?
Gold foil experiment
Which group of METALS is the most reactive?
Group 1 - Alkali Metals
When a measurement is repeatable and consistent it is said to have...
High precision
All orbitals of equal energy are occupied by one electron before any single orbital is occupied by a second electron.
Hund's rule
Which of the following is true about matter?
It has mass and takes up space
What scientist is best known for his "Plum Pudding" model of the atom?
J.J. Thomas
What is this element? 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6
Krypton
What atom matches this electron configuration? 1s^2 2s^2 2p^6 3s^2
Magnesium
Most elements on the periodic table are this type.
Metals
He determined the mass of an electron and confirmed it's charge in 1909 as a result of oil drop experiments.
Millikan
Which has the greater EN: N or C?
N
For a principle quantum number "n", equal to 6, is it possible for "l" to be equal to 7?
No
This group contains all colorless, odorless gases that do not react with other elements
Noble gases
Which group of the periodic table is composed of inert (not reactive) gases?
Noble gases
Which periodic group has the smallest atomic radius?
Noble gases
Which group has the smallest radius?
Noble gases?
What determines an element's identity?
The number of protons
True or False: The majority of an atom is made up of empty space
True
Which is an example of a physical property of matter?
Water freezing to ice
What atom matches this electron configuration? 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10
Zinc
What is the noble gas electron configuration for sulfur?
[Ne] 3s^2 3p^4
Which is NOT an example of a physical property of matter?
ability to rust
The photoelectric effect only occurs if the light shining on the metal is:
above a minimum frequency
Elements are
identified by very specific physical and chemical properties; substances that cannot be broken down to any other substance by physical or chemical means; represented by one or two letter symbols organized in the Periodic Table
When a metal atom becomes a cation...
it loses an electron
Is 20 g greater than, less than, or equal to 2 kg?
less than
Metals ________ electrons when they become ions
lose
When atoms __________ electrons they become positive ions.
lose
The Law of Conservation of Matter states that
matter is neither created nor destroyed in any process
Elements which are shiny, conduct electricity and heat are called
metal
The atoms along the staircase are called
metalloids
What quantum number describes the energy level of an orbital?
n
Anions are ______ ions.
negative
