<span>Lithium atoms have one valence electron, where as oxygen atoms have six. Lithium atoms tend to give up their single valence electrons, and oxygen tends to gain two valence electrons from other atoms, like lithium. They do this so they will have filled valence shells. hope this answers your question :)</span>
Option “A” is the crest of the wave because it’s the maximum value of upward displacement within a cycle.
The main difference between a square and a trapezoid is that a square has two pairs of parallel sides, while a trapezoid only has one
