Chem Ch. 4.3 Electron Configuration (Part 1)

​Ch. 4.3 Electron Configuration

Multiple Choice

How many electrons are present in an atom of calcium that has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 ?

• 6

• 16

• 20

• 36

Multiple Choice

In a ground-state hydrogen atom in which orbital is the electron?

• 1s

• 2s

• 2p

• 3s

Multiple Choice

The statement that no two electrons in the same atom can have the

same four quantum numbers is a restatement of

• Bohr’s law

• Hund’s rule

• the Aufbau principle

• the Pauli exclusion principle

Multiple Choice

According to the Aufbau principle, which of the following sublevels is

lowest in energy?

• 3d

• 4s

• 4p

• 5s