Chemistry, 17.10.2019 02:00, mayaparness

Ions of the elements oxygen (o), sulfur (s), and selenium (se) usually have charges of 2-. ions of the elements fluorine (f), chlorine (cl), and bromine (br) usually have charges of 1-.

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Ions of the elements oxygen (o), sulfur (s), and selenium (se) usually have charges of 2-. ions of t...