Chemistry Quiz

What type of bonds make up triple bonds?

• one sigma and two pi

• two sigma and two pi

• two sigma and one pi

• one sigma and one pi

For some molecules, no single Lewis structure can completely describe the distribution of electrons. The display of an intermediate character within the bonds of such molecules is called _______.

A sigma bond is stronger than a pi bond.

• True

• False

Some atoms are stable with less than a full octet of electrons when they form molecules, but none ever have more than eight electrons.

• True

• False

Predict the shape of the molecule HCN.

• linear

• bent

• pyramidal

• tetrahedral

Predict the shape of the molecule H₂CO.

• bent

• pyramidal

• tetrahedral

• trigonal planar

Which of the following shapes is always taken in a polar bond?

• linear

• bent

• tetrahedral

• trigonal planar

Any molecule having a pyramidal or a bent shape will be polar.

• True

• False

Tags

NGSS.HS-PS2-6

The theory that states that covalent bonds are formed when orbitals of different atoms overlap is called the ________ theory.

• valence bond

• VSEPR

• molecular orbital

• electron sea

What type of bond forms from orbitals overlapping end to end?

• pi

• sigma

• gamma

• delta