Question

which of the following types of nuclear emission is stopped by a sheet of notebook paper?
select one:
a. beta particle.
b. gamma ray.
c. neutron.
d. alpha particle.

what type of nuclear radiation contains no charged particles?

select one:
a. alpha
b. beta
c. proton
d. gamma

Explanation:

For the first question: Alpha particles have low penetration power due to their large mass and charge, so they are stopped by thin materials like notebook paper. Beta particles need thin metal, gamma rays need thick lead, and neutrons require dense materials.
For the second question: Gamma rays are electromagnetic radiation, not particles, so they have no electric charge. Alpha particles have a +2 charge, beta particles have a -1 or +1 charge, and protons have a +1 charge.

Answer:

1. d. Alpha particle.
2. d. Gamma