What is the charge of an oxygen ion?

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Nam D. Share
Feb 10, 2018

Answer:

Usually #-2#

Explanation:

Oxygen is element number #8# on the periodic table, and a neutral oxygen atom therefore has #8# electrons. To complete its octet, oxygen will want to gain #2# more electrons to have an electron configuration of #2,8#.

So, an oxygen ion will usually exist as #O^(2-)#.

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Feb 9, 2018

Answer:

It can be either #-1# or #-2#

Explanation:

Because Oxygen, as a neutral atom, has 6 electrons in the valence shell, it can gain up to 2 electrons before it's valence shell is full.

It will not, however, loose any electrons because it has more than 4 in the valence shell. This means the charge will always be negative, but can be different numbers.

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