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: An atom, which has a mass number of 19, with 10 neutrons : An atom, which has a mass number of 20, with 10 neutrons

: An atom, which has a mass number of 23, with 12 neutrons : An atom, which has a mass number of 24, with 12 neutrons

: An atom, which has a mass number of 27, with 14 neutrons

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Fluorine (F)

An atom, which has a mass number of 19, with 10 neutrons

Neon (Ne)

An atom, which has a mass number of 20, with 10 neutrons

Sodium (Na)

An atom, which has a mass number of 23, with 12 neutrons

Magnesium (Mg)

An atom, which has a mass number of 24, with 12 neutrons

Aluminum (Al)

An atom, which has a mass number of 27, with 14 neutrons

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