ScienceCâu 79 / 120
An atom that has gained or lost electrons and therefore carries a charge is called a(n):
a.Isotope
b.Ion
c.Molecule
d.Compound
Giải thích
An ion is an atom or group of atoms with a net electrical charge due to gaining or losing electrons. Isotopes differ in neutron number, not charge.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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