1. Q: Solid substance are most likely to sublime if they have…
FIRST: WHAT IS SUBLIMATION?
SECOND: FIND two answer choices that are pairs
Low vapor pressure and weak intermolecular attractions
High vapor pressure and strong intermolecular attractions
Low vapor pressure and strong intermolecular attractions
High vapor pressure and weak intermolecular attractions

2. Q: Which of the following liquids has the weakest van der Waal’s forces of attraction between it’s molecules?
FIRST: What is meant by van der waal forces?
SECOND: look at all the answer choices, what do they have in common?
Kr(L)
Xe(L)
He(L)
Ne(L)

3. Q: Which conditions are required to from 42He during the fusion reaction in the Sun?
FIRST: What happens in a fusion reaction?
Low temperature and high pressure
Low temperature and low pressure
High temperature and low pressure
high temperature and high pressure

4. Q: An 80 milligram sample of radioactive isotope decays to 5 milligrams in 32 days. What is the half-life of this element?
FIRST: What equation do you use for ½ life?
8 days
2 days
16 days
4 days

5. Q: An uncontrolled chain reactions takes place during
FIRST: look at all the answer choices, what do they have in common?
Fusion of light nuclei into heavier nuclei
Operation of fission nuclear reactor
Production of energy by the Earth’s Sun
Explosion of an atomic bomb
SECOND: What is fusion…What is fission

6. Q: Hydrogen can exist as a liquid only at very low temperatures
Q: Hydrogen can exist as a liquid only at very low temperatures. This is primarily because the attractive forces between the molecules are
FIRST: What is meant by van der waal forces?
SECOND: look at all the answer choices, what do they have in common?
Hydrogen bonds
Van der Waals forces
Ionic bonds
Covalent forces

7. Q: Given the reaction
11H + 31H  42He + energy
The process represent by the reaction is called
FIRST: draw what each answer choice looks like
Artificial transmutation
fusion
fission
Alpha decay

8. Q: The atomic mass unit is defined as exactly 1/12 of the mass of an atom of
FIRST: FIND two answer choices that are pairs
146C
2412Mg
126C
2612Mg

9. Q: Which process represents a chemical change?
FIRST: FIND two answer choices that are pairs
Evaporation of water
Melting of ice
Corrosion of Copper
Crystallization of sugar

10. Q: Nuclear fusion differs from nuclear fission because nuclear fission reactions
FIRST: What is fission? What is fusion?
Convert mass to energy
Form heavier isotopes from lighter isotopes
Convert energy to mass
Form lighter isotopes from heavier isotopes

11. Q: What is the charge of the nucleus in an atom of oxygen-17?
FIRST: What subatomic particles are in the nucleus? What are the charges of these particles? -2 +8
+17