1. nuclear decay by alpha particle emission is more common in atoms of elements that:
a have an atomic number greater than 83
b have a proton to neutron ratio of greater than 3: 1
c have an atomic number less than 83
d have more electrons than protons

2. identify the missing particle in the following equation: 3/2he + 3/2he -> 2 1/1he +
(3/2he refers to 3 above 2 next to he as an isotope symbol)
a 2/1he
b 1/1he
c 5/3li
d 4/2he

3. one of the major drawbacks to using nuclear fission as a reliable energy source is:
a there is not enough energy produced by this method to make it profitable.
b the process cannot be well-controlled.
c the intense amount of heat require to initiate the reaction.
d the products are more radioactive than the reactants.

4. which of the following concerns apply to nuclear fission reactions?
a concern about the disposal of nuclear waste
b concern about the safe operation of nuclear plants
c concern about nuclear weapons proliferation
d all of these are concerns

5. the energy output of the sun and other stars is a result of fission reactions among hydrogen nuclei.
true
false

6. why is the total mass of a helium nucleus not equal to the mass of its individual parts? (points : 3)
a the "missing" mass is due to inaccurate measurement on a very small scale.
b the "missing" mass has been converted to energy.
c the "missing" matter has been converted to mass.
d the "missing" mass has been converted to matter.

7. in a nuclear reaction, the mass-energy of the reactants is generally: (points : 3)
a less than the mass-energy of the products
b equal to the mass of the products
c equal to the energy of the products
d equal to the mass-energy of the products

8. a mass of 10.0 kilograms is completely converted into energy. what is this amount of energy in joules? (1 j = 1 kg m2/s2) (points : 3)
a 3.33 x 10^8 j
b 1.11 x 10^-8 j
c 3.00 x 10^16 j
d 9.00 x 10^17

9. a mass of 4.00 kilograms is completely converted into energy. what is this amount of energy in joules? (1 j = 1 kg m2/s2) (points : 3)
a 1.20 x 10^9 j
b 1.33 x 10^-8 j
c 3.60 x 10^17 j
d 4.4 x 10^-16 j

10. according to einstein's formula for the conversion of mass and energy, to find the energy, multiply the mass by the speed of light. (points : 2)
true
false