Polarity & VSEPR Review

Front

What is the definition of a nonpolar molecule?

Back

A nonpolar molecule is one in which electrons are shared equally between atoms, resulting in no overall charge difference across the molecule.

Front

What is the definition of a polar molecule?

Back

A polar molecule is one in which electrons are shared unequally between atoms, leading to a partial positive charge on one end and a partial negative charge on the other.

Front

What type of bond is formed between two nonmetals with similar electronegativities?

Back

Polar covalent bond.

Front

What type of bond is formed between a metal and a non-metal?

Back

Ionic bond.

Front

What is the VSEPR theory used for?

Back

VSEPR theory is used to predict the geometry of molecular structures based on the repulsion between electron pairs.

Front

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

Back

Tetrahedral.

Front

What is the molecular shape of a molecule with three bonding pairs and one lone pair?

Back

Trigonal pyramidal.

Front

In a polar covalent bond, how are electrons shared?

Back

Unequally.

Front

What is the electronegativity difference that typically indicates a polar covalent bond?

Back

An electronegativity difference of 0.4 to 1.7.

Front

What is the electronegativity difference that typically indicates an ionic bond?

Back

An electronegativity difference greater than 1.7.