Answer:
The electronic configuration of the magnesium atom shows that it has two unpaired outermost shell electrons while that of oxygen shows that it has six outermost shell electrons with two of them unpaired.
By means of elecron transfer, magnesium atom donates its two electrons to the oxygen atom to now have a charge of +2 while the oxygen then has a charge of -2. This results in an ionic bonding between the two atoms.
Explanation:
The structure is found in the attachment below
Answer:

Explanation:
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In this case the undergoing chemical reaction is:

Next we identify the limiting reactant with the given amounts of methane and oxygen by computing the available moles of methane and the moles of methane consumed by the 133 g of oxygen:

In such a way, the limiting reactant is methane with 0.75 moles which produce the following mass of carbon dioxide:

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If electrons are negative, losing an electron makes the ion positive.
Therefore Cu1+ contains 1 unpaired electron.