Electron Configuration and History of the Atom

How many electrons can the first energy level hold?

• 1

• 2

• 8

• 0

What atom matches this electron configuration? 2-8-2

• Neon

• Magnesium

• Aluminum

• Potassium

What electron configuration matches an oxygen atom?

• 2-8-18-7

• 2-6

• 2-8

• 2-8-9-2

What atom matches this electron configuration? 2-8-16-2

• Zinc

• Copper

• Nickel

• Germanium

What is the charge of an atom that has gained one electron?

• -1
• -2
• +1
• +2

How many electrons can the second energy level hold?

• 1

• 2

• 8

• 0

What is the maximum number of electrons in the third energy level?

• 1

• 2

• 8

• 18

What is the maximum number of electrons that can occupy the LAST energy level used (valence energy level)?

• 1

• 2

• 8

• 18

What is the charge of an atom that has lost one electron?

• -1

• -2

• +1

• +2

Which of the following represents a possible electron configuration of sodium in the excited state?

• 2-8-1

• 2-7-2

• 2-7-1

• 2-8