Describe what type of electron transfer happens between these two atoms.

Answer:
Magnesium loses it's two electrons and Oxygen gains two electrons. Magnesium is now a cation and Oxygen is now an anion. Both become stable.
Explanation:
The type of electron transfer which happens between the Mg and O atom is a complete transfer of electrons from the Mg atom to the O atom in an ionic bond.
The most electropositive electron usually is usually the donor while the most electronegative elements is the acceptor.
As evident in the case above;
Ultimately, an ionic bond is formed between the Mg and O atoms.
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