Two nuclei may have equal Z, but different A, because they ...

[rl]

Two nuclei may have equal Z, but different A, because they contain
 a. equal numbers of protons and neutrons.
  b. equal numbers of protons but different numbers of neutrons.
  c. different numbers of protons but equal numbers of neutrons.
  d. different numbers of protons and neutrons.
  e. electrons as well as neutrons.

Question 2

Two nuclei which share the same atomic number Z always are
 a. stable. b. unstable. c. isotopes.
  d. isobars.
  e. radioactive.

[fromAlphatoOmega22]

Answer to Question 1

B

Answer to Question 2

C

[rl]

Excellent

[shewald78]

Thanks for the timely response, appreciate it