The atomic mass of an element
A)is determined by the number of protons and neutrons it contains.
B)equals the number of protons plus the number of electrons.
C)equals the number of neutrons.
D)changes after each reaction.
E)depends on the number of electrons in the outermost shell.

Question

Quizplus · Accepted Answer

The atomic mass of an element is determined by the number of protons and neutrons it contains, which are found in the nucleus of the atom. The number of electrons in the outermost shell (valence electrons) does not affect the atomic mass, as they have negligible mass compared to protons and neutrons. The atomic mass does not change after each reaction, as it is a characteristic property of each element.

The Atomic Mass of an Element