The Actual Mass of an Atom is Known as Its

Question

The actual mass of an atom is known as its
A)atomic number.
B)atomic weight.
C)mass number.
D)atomic mass unit.
E)element number.

Accepted Answer

The actual mass of an atom is known as its atomic weight. Atomic number refers to the number of protons in the nucleus, mass number is the sum of protons and neutrons in the nucleus, atomic mass unit (amu) is a unit of measurement for atomic mass, and element number is the number of protons in the nucleus that uniquely identifies an element.