HTHS 1110 unit 2 Quiz
Isotopes FE include FE-54, Fe-56, FE-57, and FE-58. According to the periodic table, the atomic number of FE is 26. The average atomic weight is 55.84. How many protons does FE-58 contain?
26
Isotopes of FE include FE Dash 54, FE Dash 56, FE Dash 57, and FE - 58. According to the periodic table number of FE is 26. How many neutrons does FE 58 contain?
32
The mass number is the sum of the protons plus electrons. We know FE 58 has 26 protons because that's given in the atomic number.
58-26=32 or total mass - protons=neutrons
Carbon-12 has
6 protons and 6 neutrons
pH scale is acidic when the number is below
7
An atom has 8 protons, 8 neutrons, and 8 electrons. Another isotope of the same element might have ...
8 protons, 9 neutrons, and 8 electrons
Atom A has an atomic mass of 15 and an atomic number of 6. Atom B has an atomic mass of 15 and an atomic number of 7. Atom C has an atomic mass of 14 and an atomic number of 7. Atom D has an atomic mass of 14 and an atomic number of 5. Which of these atoms are isotopes of each other?
B and C
carboxyl group
COOH
Isotopes of carbon include carbon-12 carbon-13 and carbon-14. According to the periodic table, Carbon's atomic number 6, and the atomic weight of 12.01. Based on this information, what is the most common isotope of carbon
Carbon-12
beta particle radioactive decay
Electrons emitted at high energy
Element a has 11 protons and 11 neutrons Element be has 11 protons and 12 neutrons Element C has 13 protons and 13 electrons Element D has 12 protons and 13 electrons Which elements are isotopes of each other?
Elements a and B
Gamma particle radioactive decay
High energy photon
Beta medical property
High-energy electron; used in research
Which isotope of hydrogen is radioactive?
Hydrogen-3, tritium
Hydrogen bonds are found between compounds that contain hydrogen and compounds that contain moderately electronegative elements like:
K or C / Na or P? unit 2 objective 10
diffusion
Movement of molecules from an area of higher concentration to an area of lower concentration.
What subatomic particle has no charge and is in the nucleus?
Neutron
Isotopes have the same amount of protons, but differ in the amount of
Neutrons
Isotopes have the same number of protons and different numbers of
Neutrons
Because the atomic number of Polonium-210 is 84, we know it has 84 protons the rest of the mass is made up of___
Neutrons. 210-84 = 126
Alpha particles ability to penetrate through
Paper
Beta particles ability to penetrate through
Paper but not aluminum
Alpha medical property
Source of ionizing radioaction
Gamma particles ability to penetrate through
Tissue, causing damage
When H3PO4 is dissolved in water the pH drops from 7 to 5. We call H3PO4 a/an:
Weak acid
An ion with more electrons than protons is called a
anion
Of the folowing, the electromagnetic wave with highest energy is:
blue light red light ultraviolet l x-rays *x-rays
The subatomic particles responsible for the chemical behavior of atoms are:
electrons
Elements on the far right of the periodic table are classified as
noble gases
Which one of these equations is properly balance? A H2 + O2 ---> H2O B H2 +2O2 ---> 2H2O C 2H2 + O2 ---> 2H2O D 2H2 + O2 ---> 4H20
not B
The study of function in the human body is ___
physiology
waters special properties are largely due to the presence of ___ bonds within the H2O molecule (that is, between the H atoms and O atoms)
polar covalent
A bond that has unequal sharing of electrons and exists between two non-metal atoms is a
polar covalent bond
water acts as a good solvent because the water molecules contain:
polar covalent bonds
The positively-charged particle in the nucleus of an atom that is relatively heavy and defines an atom's identity is the:
proton
Isotopes have the same number of
protons
Which states of matter has a definite shape and definite volume with rigidly clinging, tightly packed atoms/molecules?
solid
Of the total atoms making up the human body 63% are hydrogen. Why then doe hydrogen only comprise 10% of the mass of human body?
the mass of hydrogen is less than that of any other atom
In triple covalent bonds, two atoms are sharing ___ electrons.
6
Carbon-13 has
6 protons and 7 neutrons
Carbon-14 has
6 protons and 8 neutrons
Consider the information given in this block of the periodic table. How many neutrons are in this most common isotope of the element? Nitrogen
7
How many neutrons are in N the most common isotope of this element?
7
K is?
Potassium
The electromagnetic wave with the highest energy in this list is:
gamma rays, then x-rays, ultraviolet
The polyatomic ion OH- is the ___ ion.
hydroxide
What is the symbol for the base SI unit for volume?
L
The atomic number of ___ in an element
Protons
Cl is?
Chlorine
Alkaline pH is
above 7
Elements of the right side of the periodic table (such as O, F, and Cl) tend to:
accept electrons
A solution with a pH = 6.98 would be considered:
acidic
What is the name of the compound with the chemical formula (NH4)OH?
ammonium hydroxide
An ion is
an atom or molecule that carries either a positive or a negative electrical charge
A positively charged paerticle or Ion is called a/an:
anion
which bond is the least strong?
hydrogen bonds
Exothermic is roughly same as what word?
endothermic
Gastric juice has a pH of about 2, vaginal fluid has a pH of about 4, saliva has a pH of about 6.6, blood has a pH of 7.4, and bile has a pH of about 8.1 Which is the most acidic of these fluids?
gastric juice 2
The mass of 1 mole of a substance is equal to its
relative atomic or molecular mass in grams.
The elements in a column of the periodic table
share/have similar properties
What does the periodic table symbol Na represent?
sodium
The weight of the atomic element can be found
under the letter
When a H3PO4 is dissolved in water, the pH drops from = 7 to 5. We call H3PO4 a
weak acid
Neutral atom A has 17 protons and 20 neutrons in its nucleus, while neutral atom B has 17 protons and 18 neutrons in its nucleus. What can you say for sure about these two atoms?
they are isotopes of the same element
Unstable isotopes are called radio isotopes. As they decay they give us different types of radioactive energy. Unstable isotopes have ___ ___or ___ ___ neutrons to be balanced.
too few, too many
Which of the following correctly lists the bond strength from strongest to weakest?
triple covalent, double covalent, single covalent, ionic, hydrogen
Carbon 12 would have six protons and six neutrons which is close to the average atomic weight of
12.01
Polonium-210 is radioactive isotope that gives off alpha particles until it reaches its stable state. This isotope was discovered by Marie and Pierre Curie and was named Polonium after Marie's homeland, Poland. Polonium-210's atomic number is 84. How many neutrons does this radioisotope have?
126
From the information on the K block of the periodic table. How many protons does this atom have?
19 protons
Gamma medical property
Used to ablate(burn out) tumors that are otherwise inoperable
What are positive feedback loop examples?
childbirth blood clotting massive blood loss
Gases such as O2, N2, or CO2 are dissolved in the blood. The bonds between tow oxygen atoms in O2 two nitrogen atoms in N2 or the atoms in CO2, are examples of:
covalent bonds
George Holcomb adds surfactant to water, then tries to draw the water into a small capillary tube. We expect that capillary action which depends on hydrogen bonds between water molecules will:
decrease
Which reaction forms two monomers from a polymer?
dehydration-condensation reaction
What causes the change in positive feedback loops?
effector
What subamtomic particles carry a negative charge?
electrons
The two strands of (deoxyribonucleic acid) DNA are held together by which type of bond?
hydrogen bonds
Two strands of deoxyribonucleic acid (DNA) are held together by which type of bond?
hydrogen bonds
Which of the following states of matter has an indefinite shape and definite volume mobile atoms/molecules that still adhere to one another?
liquid
An ion with more electrons than protons is?
negatively charged (anion)
Isotopes are altering what subatomic particle?
neutrons
Very few hydrogen ions are donated in water(aqueous) solution. This means that it is a:
weak acid
Bicarbonate ions act as hydrogen ion acceptors. Because sodium bicarbonate gives off relatively few ions sodium carbonate is called a
weak base
Alpha particle radioactive decay
Helium nucleus: 2 protons, 2 neutrons, but diffs with 0 electrons
