Which of the following statements does not describe the structure of an atom? inside the nucleus of an atom are protons and neutrons. protons are positively charged sub-atomic particles. electrons are negatively charged sub-atomic particles. most of the mass of an atom comes from the electron cloud.

Most of the mass of an atom comes from the electron cloud

Explanation:

Protons are positive, Electrons are negative, and there are only protons and neutrons in the nucleus of an atom. Also there are only 6 electrons in a electron cloud and the mass of an electron is 1/1,836 the mass of a proton. So it would be the last answer.

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sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'