True False
___ 1. In terms of subatomic particles, the composition of an
alpha particle is composed of 2 protons and 2 neutrons.
___ 2. The explanation for how a beta particle is produced in
the nucleus of a radioisotope and then ejected involves the
conversion of a proton to neutron.
___ 3. After 2 half-lives have elapsed, the percentage of a
radioactive sample which has not decayed is 25% the original
sample
__ _4. The loss of an alpha particle by a radioactive nuclide
causes the atomic number to decrease by 4.
___ 5. During beta decay, the mass number remains constant.