What's the charge on Ni in the compound NiCi3? * +1
+2.
+3
- 7
-2.
3
you can't tell

+3

Explanation:

Chlorine is anion with a -1 charge. But they are three chlorine atoms.

-1 * 3 = -3

So they have a -3 charge.

So to balance the compound, the nickel has to be a cation with a +3 charge.

-3 + 3 = 0

Furthermore, a chemical bond always has a 0 charge. Remember that.

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answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.