Exploring Electron Configurations and Atomic States

What happens to electrons when an atom is energized by an outside source?

• They move to higher energy shells.

• They leave the atom.

• They stay in the same shell.

• They move to lower energy shells.

In the excited state, what is the electron configuration of beryllium?

• 2-8-1

• 2-1-1

• 2-7-2

• 2-2

What is the ground state electron configuration for potassium?

• 2-8-8-1

• 2-8-1

• 2-2-8-1

• 2-7-8-2

In the Bohr model of potassium in the excited state, how many electrons are in the fourth shell?

• 7

• 2

• 1

• 8

How many protons does potassium have in its nucleus?

• 19

• 20

• 7

• 8

What is the element symbol for an atom with an electron configuration of 2-7-2?

• Na

• F

• Cl

• N

Which element has an electron configuration of 2-8-7 in the ground state?

• Potassium

• Fluorine

• Sodium

• Chlorine

What is the most current model for the atom called?

• Thomson Model

• Wave Mechanical Model

• Bohr Model

• Rutherford Model

In the electron cloud model, where is the probability of finding an electron the highest?

• At the edges of the atom

• Near the nucleus

• Outside the atom

• In the middle of the atom

What happens when an electron absorbs energy in the wave mechanical model?

• It moves to a lower energy level.

• It stays in the same energy level.

• It moves to a higher energy level.

• It leaves the atom.