The atomic number of an atom is also equal to which quantity?
Select one:
a. the number of protons
b. the number of neutrons
c. the number of protons + the number of neutrons
d. the number or protons + the number of electrons

Question

solomonzelman · Answer

atomic number is the number of protons in an atomic nucleus.

anonymous · Answer

What do we call a pure substance that contains many identical atoms?
Select one:
a. an element
b. a compound
c. an isotope
d. a radioactive substance