Question

what type of nuclear radiation consists of particles having a positive charge?
select one:
a. beta
b. alpha
c. gamma
d. neutron

it has been determined that a vase from an archaeological dig is emitting radiation that can only be stopped by very dense materials such as lead or concrete. which of the following types of radiation is most likely being emitted from the vase?

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

Explanation:

For the first question: Beta particles are negatively charged, gamma is uncharged electromagnetic radiation, neutrons have no charge. Alpha particles are helium nuclei with a +2 positive charge.
For the second question: Alpha radiation is stopped by paper, beta by thin metal, protons are not a common archaeological emitted radiation. Gamma radiation is highly penetrating, only stopped by dense materials like lead or concrete.

Answer:

1. b. Alpha
2. d. Gamma