Lewis Structures and VSEPR Shapes

Front

What do you look for on the periodic table to determine the number of valence electrons of an element?

Back

Look at its group.

Front

What is the VSEPR shape of a diatomic molecule?

Back

Linear.

Front

How many total valence electrons does a molecule have?

Back

Count the valence electrons from all atoms in the molecule.

Front

What is the correct Lewis diagram for nitrogen trihydride, NH3?

Back

The Lewis structure shows nitrogen in the center with three hydrogen atoms bonded to it and one lone pair on nitrogen.

Front

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

Back

Tetrahedral.

Front

Define valence electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What does VSEPR stand for?

Back

Valence Shell Electron Pair Repulsion.

Front

How does VSEPR theory help predict molecular shapes?

Back

It states that electron pairs around a central atom will arrange themselves to minimize repulsion.

Front

What is the VSEPR shape of a molecule with two bonding pairs and one lone pair?

Back

Bent.

Front

How do you determine the total number of valence electrons in a molecule?

Back

Add the valence electrons of each atom in the molecule.