The term that best describes the oxide of a metal is base.
The element that would not form an acidic oxide when burnt in air is sulfur.
The oxide of a metal are also called metal oxides and they are crystalline solids that contain a metal cation (+) and an oxide anion (-).
The oxide of a metal is formed during the reaction between a metal cation and oxygen gas, hence, behave chemically like bases.
The element that would not form an acidic oxide when burnt in air is sulfur because it is a non-metal.
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