Respuesta :

AlpenGlow

Answer:

Nucleus

Explanation:

The nucleus of an atom is the central part that is made up of the protons and neutrons of the atom. It is also what makes up most of the mass of an atom. Electrons are those ones found in the orbit of of the atom (the little blue balls). They also have mass, but it is so small that it is negligible.

maryjanewambui

Answer:

nucleus

Explanation:

An atom is made up of a nucleus composed of protons and neurons, and shell orbitals that have electrons in constant motion. The protons are positively charged, neurons don't have a charge and electrons are negatively charged.

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