Q: Solid substance are most likely to sublime if they have…FIRST: WHAT IS SUBLIMATION?SECOND: FIND two answer choices that are pairs1. Low vapor pressure and weak intermolecular

attractions2. High vapor pressure and strong

intermolecular attractions3. Low vapor pressure and strong intermolecular

attractions4. High vapor pressure and weak intermolecular

attractions

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?1. Kr(L)2. Xe(L)

3. He(L)

4. Ne(L)

Q: Which conditions are required to from 42He

during the fusion reaction in the Sun?• FIRST: What happens in a fusion reaction?

1. Low temperature and high pressure2. Low temperature and low pressure3. High temperature and low pressure4. high temperature and high pressure

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?

1. 8 days2. 2 days3. 16 days4. 4 days

Q: An uncontrolled chain reactions takes place during• FIRST: look at all the answer choices, what do

they have in common?

1. Fusion of light nuclei into heavier nuclei2. Operation of fission nuclear reactor3. Production of energy by the Earth’s Sun4. Explosion of an atomic bomb

• SECOND: What is fusion…What is fission

Q: Hydrogen can exist as a liquid only at very low temperatures. This is primarily because the attractive forces between the molecules areFIRST: What is meant by van der waal forces?SECOND: look at all the answer choices, what do they have in common?1. Hydrogen bonds2. Van der Waals forces3. Ionic bonds4. Covalent forces

Q: Given the reaction1

1H + 31H 4

2He + energy

The process represent by the reaction is calledFIRST: draw what each answer choice looks like1. Artificial transmutation2. fusion3. fission4. Alpha decay

Q: The atomic mass unit is defined as exactly 1/12 of the mass of an atom ofFIRST: FIND two answer choices that are pairs1. 14

6C

2. 2412Mg

3. 126C

4. 2612Mg

Q: Which process represents a chemical change?FIRST: FIND two answer choices that are pairs

1. Evaporation of water2. Melting of ice3. Corrosion of Copper4. Crystallization of sugar

Q: Nuclear fusion differs from nuclear fission because nuclear fission reactionsFIRST: What is fission? What is fusion?

1. Convert mass to energy2. Form heavier isotopes from lighter isotopes3. Convert energy to mass4. Form lighter isotopes from heavier isotopes

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?

1. 02. -23. +84. +17