Covalent Bonding Quiz

Which of the following is not an example of a molecular formula?

• H2O

• B

• NH3

• O2

When a stable covalent bond forms, the potential energy of the atoms

• increases.

• decreases.

• remains constant.

• becomes zero.

Bond length is the average distance between two bonded atoms

• at which potential energy is at a minimum.

• at which kinetic energy is at a maximum.

• at which potential energy is at a maximum.

• and equal to one-half the diameter of the electron cloud.

The energy released when a covalent bond forms is the difference between zero and the

• maximum potential energy.

• kinetic energy of the atom.

• minimum potential energy.

• bond length expressed in nanometers.

In a molecule of fluorine, the two shared electrons give each fluorine atom how many electron(s) in the outer energy level?

• 1

• 2

• 8

• 32

The electron configuration of nitrogen is 1s2 2s2 2p3. How many more electrons does nitrogen need to satisfy the octet rule?

• 1

• 3

• 5

• 8

What group of elements satisfies the octet rule without forming compounds?

• halogen

• noble gas

• alkali metal

• alkaline-earth metal

In drawing a Lewis structure, each nonmetal atom except hydrogen should be surrounded by

• 2 electrons.

• 4 electrons.

• 8 electrons.

• 10 electrons.

In drawing a Lewis structure, the central atom is generally the

• atom with the greatest mass.

• atom with the highest atomic number.

• atom with the fewest electrons.

• least electronegative atom.

To draw a Lewis structure, one must know the

• number of valence electrons in each atom.

• atomic mass of each atom.

• bond length of each atom.

• ionization energy of each atom.