1. Reviewing Chemistry Concepts
Copy each of the questions. Select the correct letter for your answer.

2. Question 1 Which group of elements is generally unreactive?
Alkali metals
Noble gases
Halogens
d. Alkaline earth metals

3. Question 2
If the temperature of a gas changes but the number of moles and volume remain constant, which of the following must also change?
Mass
Pressure
Density
Number of molecules

4. Question 3
How many valence electrons are in group 1 elements? 1 2 3

5. Question 4
Assume you mix isopropyl alcohol and water. Which example below would help you select the proper technique to separate them?
Clear mixture
You used tap water
The boiling point is 82 C
8 oz of alcohol were added to 8 oz of water

6. Question 5
How many electrons are in a Cd3+ ion? 45 48 51
112

7. Question 6
From which of the following atoms would it be the most difficult to remove an electron?
Aluminum
Sulfur
Sodium
Chlorine

8. Question 7 As the wavelength of a wave increases, which also occurs?
Planck’s constant decreases
Speed of the wave increases
Energy of the wave increases
Frequency of the wave increases

9. Question 8 Compared to nonmetals, metals tend to have
An acidic form of oxide
Higher ionization energy
Higher electron shielding
Lower electronegativity

10. Question 9
Assume you have 4 sealed containers with the volumes 50 mL, 100 mL, 250 mL and 500 mL. If each of these contains .25 moles of helium gas at a standard temperature, then which container has the greatest pressure?
500 mL
250 mL
100 mL
50 mL

11. Question 10
The solubility rules for various salts in water indicate most salts of ___________ are not soluble in water.
Na+
Li+ K+
Ag+