1. Lewis structures rules to know

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Elements in the first row are stable with how many electrons?

A duet (2 e-)

Elements in the second row are the most stable with?

An octet (8 e-)

Elements in the third row or greater are the most stable with?

Can expand to unfilled d orbitals, more than 8 e-

When elements in the 3rd row or lower share more than 8 electrons, what is the reason? (expanded octet)

To minimize formal charges

What is a double bond?

4 electrons shared between two atoms

What is a triple bond?

Six electrons shared between atoms

What are Bonding Electrons?

Electrons shared between two atoms shown as lines (1 line = 2 electrons)

What are Lone Pair electrons?

Unshared electrons shown as dots around an atom (1 dot = 1 electron)