Which of the following changes occur to the nucleus when a heavy element undergoes

Which of the following changes occur to the nucleus when a heavy element undergoes

Which of the following changes occur to the nucleus when a heavy element undergoes alpha particle emission?

A)Only the number of neutrons decreases.

B)Only the number of protons decreases.

C)Only the number of neutrons increases.

D)Only the number of protons increases.

E)Both the number of neutrons and protons decreases.

 

12.              Beta particles are equivalent to:

A)He nuclei.D)positrons only.

B)H atoms.E)either electrons or positrons.

C)electrons only.

 

13.              Alpha particles are equivalent to:

A)  He atoms.    B)  H atoms.    C)  electrons.    D)  positrons.    E)  He nuclei.

 

14.              Gamma rays are:

A)high-energy electromagnetic radiation.

B)H nuclei.

C)electrons.

D)He nuclei.

E)positrons.

 

15.              An alpha particle has a mass number of _____ and a charge of _____.

A)  1, 2+    B)  2, 0    C)  4, 2+    D)  4, 0

 

16.              A beta particle has a mass number of _____ and a charge of _____.

A)  1, 0    B)  0, 0    C)  0, 1– or 1+    D)  1, 1+    E)  1, 1–

 

17.              A gamma ray has a mass number of _____ and a charge of _____.

A)  1, 0    B)  1, 1+    C)  –1, 1–    D)  0, 0    E)  0, 1+

 

18.              Rank the following in order of increasing penetrating ability:  alpha particles, beta particles, gamma rays.

A)alpha particles

B)alpha particles

C)gamma rays

D)beta particles

E)beta particles

 

19.              Which of the following forms of radiation is most penetrating?

A)  alpha    B)  beta    C)  gamma    D)  positron    E)  proton

 

20.              Which of the following forms of radiation is least penetrating?

A)  alpha    B)  beta    C)  gamma    D)  positron    E)  proton