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13 July, 08:17

How many valence electrons does an oxygen atom need to gain in order to become stable? a 1 b 2 c 3 d 4

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  1. 13 July, 09:31
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    B; because to form a stable ion a element requires to have either a full or empty valence electron shell and since oxygen has 6 valence electrons it will tend to fill the valence shell (because it requires less energy) so it gains 2 more to create a total of 8 which fills up its last shell.
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