Which statement best explains how the mass of an atom is organized? most of the mass is contained in the nucleus. the mass is spread evenly throughout the whole atom. the mass is spread evenly throughout the electron cloud. most of the mass is contained in the electron cloud.

The correct statement is most of the mass is contained in the nucleus.

Explanation:

Atomic mass is determined by the sum of number of neutrons and protons present in that element.

Atomic mass = Number of neutrons + Number of protons

All the neutrons and protons are located inside the nucleus of an atom.

Hence, the total mass of an atom will contained solely in the nucleus of an atom.

the answer to this question is 3.