Question

state the nature of magnesium oxide and carbon dioxide
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Answer 1

Magnesium is reacting with oxygen from the air to make magnesium oxide (white powder). ... Carbon dioxide covers the fire, smothering it so that oxygen cannot get to it.

Answer 2

Answer:

Magnesium oxide is a white hygroscopic solid mineral that occurs naturally as periclase and is the source of magnesium.  It is an inorganic compound and consists of lattice $mg^2^+$ ions and $o^2^+$ held together by ionic bonding.

Carbon dioxide is a colourless gas.  Carbon dioxide molecules consists of carbon atom covalently double bonded to two oxygen atoms.  It occurs naturally in Earth's atmosphere.