Lewis structures, VSEPR, and Polarity

Front

What is a Lewis Dot Structure?

Back

A diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Front

What is the Lewis Dot Structure for ammonia (NH3)?

Back

The Lewis structure shows nitrogen (N) in the center with three hydrogen (H) atoms bonded to it and one lone pair of electrons on nitrogen.

Front

What is VSEPR theory?

Back

Valence Shell Electron Pair Repulsion theory predicts the shape of molecules based on the repulsion between electron pairs around a central atom.

Front

What is the molecular shape of a molecule with 3 bonded atoms and 0 lone pairs?

Back

Trigonal planar.

Front

What is the molecular shape of ammonia (NH3)?

Back

Trigonal pyramidal.

Front

What does electronegativity measure?

Back

Electronegativity measures the tendency of an atom to attract a bonding pair of electrons.

Front

What is a polar bond?

Back

A polar bond is a type of covalent bond where electrons are not shared equally between the two atoms.

Front

What is a nonpolar bond?

Back

A nonpolar bond is a type of covalent bond where electrons are shared equally between the two atoms.

Front

What determines if a molecule is polar or nonpolar?

Back

The shape of the molecule and the difference in electronegativity between the atoms.

Front

Which molecule has greater polarity: HCl or CCl4?

Back

HCl has greater polarity.