Unit 3 Flashcard

Front

Back

Phosphorus pentachloride

Front

What do the red dots in a Lewis structure indicate?

Back

Lone pairs

Front

What is the molecular shape of a molecule with two bonded pairs and one lone pair?

Back

Bent

Front

Back

H:O:H (with two lone pairs on O)

Front

Back

Sodium chloride

Front

Define a covalent bond.

Back

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Front

What is the difference between a lone pair and a bonded pair in a molecule?

Back

A lone pair is a pair of valence electrons that are not shared with another atom, while a bonded pair is shared between two atoms.

Front

What is the significance of the octet rule in chemistry?

Back

The octet rule states that atoms tend to bond in such a way that they have eight electrons in their valence shell, achieving a stable electron configuration.

Front

What is the shape of a molecule with four bonded pairs and no lone pairs?

Back

Tetrahedral

Front

What is the formula for calculating the number of valence electrons in an atom?

Back

The number of valence electrons is equal to the group number of the element in the periodic table.