1. Radioactive dating works by measuring the

Question

ratio of isotopes ***
amount of radioactivity absorbed
radioactivity left
time it takes for the radioactivity to disappear

2. Larger atoms get broken into smaller atoms in
nuclear reactors***
the Sun
X-ray machines
calorimeters

4. If two 1/1 H fused to form 2/1 H, there would be
no change in mass
a change in mass of one proton***
no change in energy
the loss of a neutron

5. A nuclear reactor produces
bombs
electricity***
a fusion reaction
the same energy as the sun

6. PET scans use
X-rays
gamma radiation
positrons***
alpha emissions

Answer 1

I agree with your answers but I think #1 has two answers. a is correct but so is c.