If two different nuclides have the same atomic number,it must mean that
A)they have the same atomic mass.
B)they have the same mass number.
C)they have the same number of protons.
D)they have the same number of electrons.
E)they have the same number of neutrons.

Question

Quizplus · Accepted Answer

Atomic number is the number of protons in an atom. Therefore, if two different nuclides have the same atomic number, it means that they have the same number of protons. They may have different numbers of neutrons (different isotopes) and therefore different atomic masses or mass numbers. The number of electrons may also vary depending on whether the atom is ionized or not.

If Two Different Nuclides Have the Same Atomic Number,it Must