help with neutrons, protons and carbon-12
1. the number of neutrons and protons in an atom indicates its
a. mass number
b. atomic mass
c. atomic number
is the answer a?
2. carbon 12 and carbon 14
a. are isotopes
b. contain different numbers of neutrons
c. contain the same number of protons
d. all of these
is the answer for #2 d?