Question 1

Question

A student looks up an element on the periodic table. The table says that the atomic number of the element is 12 and the mass number of the element is 40. What information do these two numbers convey about the element?

a
The element has 40 protons and 12 neutrons
b
The element has 12 protons and 12 neutrons
c
The element has 12 protons and has 28 neutrons
d
The element has 28 protons and 40 neutrons
Question 2
In order for an atom to be considered "neutral", which of the following must be true?

a
The number of protons and neutrons must be the same
b
The number of protons and electrons must be the same
c
There are more protons than electrons
d
There are more neutrons than protons
Question 3
In all elements in a group, the thing that is the same is the:

a
Number of electrons in the valence shell
b
Number of electrons
c
Number of protons
d
Number of neutrons
Question 4
Match the following groups with their descriptions

Column A
1.
Halogens:
Halogens
2.
Alkali Metals:
Alkali Metals
3.
Alkali Earth Metals:
Alkali Earth Metals
4.
Noble Gases:
Noble Gases
Column B
a.Group number 1, very reactive
b.Reactive, but not the most reactive
c.Group number 7, very reactive
d.Inert. Do not react with anything
Question 5
Two of most unique elements on the periodic table are hydrogen and helium. What makes them so unique and removed from the other groups on the periodic table?

a
Unlike all other elements, hydrogen and helium are gases
b
Unlike all other elements, hydrogen and helium are not considered metals
c
Unlike all other elements, hydrogen and helium only have a maximum of 2 valence electrons
d
Unlike all other elements, hydrogen and helium have very limited properties
Question 6
The periodic table groups elements into which of the following three categories?

a
Solids, Liquids, Gases
b
Heavy, Light, Medium
c
Dense, Expanded, Compressed
d
Metals, Nonmetals, Metalloids
Question 7
A bond between sodium (Na) and chlorine (Cl) is what type of bond?

a
metallic
b
hydrogen
c
covalent
d
ionic
Question 8
Which of the following must happen in order for atoms to bond either ionically or covalently with one another?

a
The valence shells of all atoms must be filled after the bonding occurs
b
The chemical properties of the atoms must be satisfied
c
The ions must have different charges
d
The resulting compound must follow ionic naming conventions
Question 9
Which of the following phase changes involves a gas turning into a liquid?

a
Condensation
b
Boiling
c
Sublimation
d
Freezing
Question 10
If you keep a gas's temperature constant, how would you increase the volume of the gas?

a
You would change the temperature
b
You would increase the pressure
c
You would decrease the temperature
d
You would decrease the pressure
Question 11
Of five different laboratory solutions, the solution with the highest acidity has a pH of

a
11
b
7
c
12
d
5
e
3
Question 12
Which state of matter would have the highest kinetic energy?

a
Solid
b
Gas
c
Liquid
Question 13
Use the following solubility graph to answer the question below.

A solution of 10 grams KCl at 10 degrees Celsius is said to be:

a
unsaturated
b
saturated
c
supersaturated
Question 14
A student is making a salt water solution for a lab experiment. Which of the following would increase in the rate the salt dissolves?

a
cooling the water
b
using salt cubes instead of crushed salt
c
stirring the solution

Answer 1

Here are the answers to each of your questions:

Question 1:
The element has 12 protons and has 28 neutrons (c).

Question 2:
The number of protons and electrons must be the same (b).

Question 3:
Number of electrons in the valence shell (a).

Question 4:

1. Halogens: Group number 7, very reactive (c)
2. Alkali Metals: Group number 1, very reactive (a)
3. Alkali Earth Metals: Reactive, but not the most reactive (b)
4. Noble Gases: Inert. Do not react with anything (d)

Question 5:
Unlike all other elements, hydrogen and helium only have a maximum of 2 valence electrons (c).

Question 6:
Metals, Nonmetals, Metalloids (d).

Question 7:
Ionic (d).

Question 8:
The valence shells of all atoms must be filled after the bonding occurs (a).

Question 9:
Condensation (a).

Question 10:
You would decrease the pressure (d).

Question 11:
The solution with the highest acidity has a pH of 3 (e).

Question 12:
Gas (b).

Question 13:
A solution of 10 grams KCl at 10 degrees Celsius is said to be: saturated (b). (Assuming the graph shows the solubility at that temperature and that 10 grams is below the saturation point.)

Question 14:
Stirring the solution (c).

If you have any further questions or need clarification, feel free to ask!