Physics and Chemistry

In alpha decay, alpha particles are ejected from the nucleus. Which equation represents alpha decay?

A is the right answer

An isotope undergoes radioactive decay by emitting radiation that has a -1 charge. What other characteristic does the radiation have?

A.some shielding required

Which can have either a positive charge or a negative charge when they are released during radioactive decay?

B. beta particles

A scientist notices that a lump of niobium is warm to the touch and wonders if nuclear reactions are taking place in the metal. How can she find out?

B.Check for the presence of alpha, beta, and gamma particles.

An atom that has 84 protons and 86 neutrons undergoes a reaction. At the end of the reaction, it has 82 protons and 84 neutrons. What happened to the atom?

C.It emitted an alpha particle in a nuclear reaction.

An isotope undergoes radioactive decay. The new isotope that forms has an atomic number that is 2 less than the original isotope's.

C.alpha decay because alpha particles have two protons and two neutrons

While a certain isotope decays, it emits photons. What kind of decay is happening?

C.gamma decay

Deuterium is an isotope of hydrogen. The nucleus of a deuterium atom consists of one proton and one neutron. When two deuterium nuclei fuse, helium-3 is formed, and a neutron is emitted. Which equation illustrates this process?

D. is the right answer

Different types of radiation have different penetrating abilities. For example, gamma rays can pass through cloth and paper, but alpha particles are blocked by cloth and paper. Beta particles are blocked by aluminum foil, but gamma rays are not. However, all three types of radiation are blocked by thick concrete or lead. Based on the information, at which numbered spot in the table does each type of radiation belong?

D.1 = gamma; 2 = alpha, 3 = beta

Two protons and two neutrons are released as a result of this reaction.

Which particle is released? A.one alpha particle (right answer)