Options:
A.
B.
C.
D.
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Earlier discussion
2 older comments kept for context.
Adeboye favour
The correct answer is: A) -2
Explanation:
In BaO (Barium oxide):
Ba is an alkaline earth metal (Group 2), so it has a fixed oxidation number of +2.
The compound BaO is neutral, so the sum of the oxidation numbers must be zero.
Let the oxidation number of O be x.
+2 + x = 0 => x = -2
Final Answer:
✔ A) -2
Amos samuel
The oxidation state of barium is +2, so multiply the atomicity of each atom with their oxidation number then equate the equation to 0 since the compound has no charge.
1×(+2) + 2O = 0
2O = -2
O = -2 / 2
O = -1