Chemistry, 11.10.2020 02:01 ciaralamont2

Most of an atom consists of empty space. Its mass is concentrated in its center, which is called the nucleus. The nucleus consists of protons and neutrons. (The ordinary hydrogen atom is an
exception; it contains one proton but no neutrons.) Protons carry a positive electrical charge, while
neutrons carry no electrical charge. Circling the nucleus is a cloud of negatively charged electrons.

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Most of an atom consists of empty space. Its mass is concentrated in its center, which is called the...