General Chemistry Finals Reviewer

According to which of the following principles, an atom can only have two electrons occupying an orbital?

• Aufbau

• Electronic Configuration

• Hund’s rule

• Pauli’s exclusion

According to which principles, electrons first inhabit the lowest-energy orbital until they are joined by more electrons to occupy the higher-energy orbital?

• Aufbau

• Electronic Configuration

• Hund’s rule

• Pauli’s exclusion

Which principle states that for a set of orbitals, electrons occupy orbitals of equal energy?

• Aufbau

• Electronic Configuration

• Hund’s rule

• Pauli’s exclusion

How many electrons are possible to occupy the principal sublevel at a time?

• 2

• 4

• 6

• 10

Which of the following sublevels can hold a maximum of 10 electrons?

• Sharp (s)

• Principal (p)

• Diffuse (d)

• Fundamental (f)

A gas consists of molecules whose size is very much SMALLER than the distances between them. As a consequence, the volume of the gas molecules is negligible compared to the total volume of the container.

At low pressures when intermolecular forces distance are much larger than molecular diameter the intermolecular forces between gas molecules are NEGLIGIBLE.

Gas molecules are CHANGING, in random motion and they collide against other molecules or the container walls.

The absolute temperature of the gas is a measure of the average MECHANICAL energy of molecules. This means that molecular motion is greater at higher temperatures, that is, molecules move faster.

Collisions against container walls give rise to the phenomenon called PRESSURE - the force exerted by colliding molecules per unit area of container walls.