Question

all the mass of an atom is concentrated
in the nucleus

Answer 1

Most of an atom is empty space. The mass of the atom is concentrated in the nucleus. The nucleus is composed of the atoms’ protons (positively charged particles), neutrons (neutrally charged particles). Protons and neutrons have a mass of about 1 amu (atomic mass unit), while electrons have an atomic mass unit of about 0 amu

Answer 2

Answer:

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