Question

The common charge on an atom in group 17 would be....

+1
+7
-7
-1
+17
ñ How many total electrons does 0-2 (an oxide ion) have?

Answer 1

Step-by-step explanation:

1one electron and -1 for anions

2 O2- indicates an ion of oxygen having two extra electrons. I.e., since an oxygen atom normally has 8 protons and 8 electrons, this ion has 10 electrons (-10 charge) and 8 protons (+8 charge) giving it a charge of -2 (-10 + 8 = -2).

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