Physics, 11.09.2019 21:30, remomy05

An atom has 18 protons, 18 electrons, and 20 neutrons.
this atom has ?
a negative charge
an atomic number of 20
a mass number of 38
a positive charge

Answers: 2

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An atom has 18 protons, 18 electrons, and 20 neutrons.
this atom has ?
a negative char...