<span>I believe its, the federal principle or system of government. Hope this can help!! >-<</span>
As per the rule, oxidation number of alkaline earth metals in their compounds is +2. Oxidation number of oxygen in it's compounds is -2(except peroxides) and the sum of oxidation numbers of all the elements of a neutral compound is zero.
Answer:
E
Explanation:
This is because all steps from A-D are important to obtain an accurate result
