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-.

True

Explanation:

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As long as the group VIA elements have 6 valence electrons (electrons at the outermost shell) they just need two electrons to attain the octate, it means that the resulting charge must be - 2. In such a way, since VIIA elements have 7 valence electrons, they just need one electron to attain the octate, it means that the resulting charge must be - 1.

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