An atom consists of subatomic particles known as electrons, protons, and neutrons. While the protons and neutrons are present inside the nucleus, the electrons revolve around the nucleus in fixed orbitals or shells. In a neutral atom, the number of positively charged protons and negatively charged electrons are equal. This number is the same in all the atoms of an element.

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Chapter 2, Problem 2A

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An atom consists of subatomic particles known as electrons, protons, and neutrons. While the protons and neutrons are present inside the nucleus, the electrons revolve around the nucleus in fixed orbitals or shells. In a neutral atom, the number of positively charged protons and negatively charged electrons are equal. This number is the same in all the atoms of an element.

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