Electron Configuration

Which of the following elements has an electron configuration of 1s²2s²2p⁶3s²3p⁵

• Chlorine

• Sodium

• Argon

• Sulfur

Which of the following elements has an electron configuration of 1s²2s²2p⁶3s²3p²

• Aluminum

• Phosphorus

• Silicon

• Neon

Which of the following elements has an electron configuration of 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹

• Zinc

• Germanium

• Copper

• Gallium

How many sublevels are there in the third energy level?

• 1

• 2

• 3

• 4

What is the total number of electrons on the fourth principal energy level?

• 2

• 8

• 18

• 32

Which of the following electron configurations represents Potassium?

• 1s²2s²2p⁶3s²3p⁶4s²

• 1s²2s²2p⁶3s²3p⁶4s¹

• 1s²2s²2p⁶3s²3p⁶4s²3d⁶

• 1s²2s²2p⁶3s²3p²

Which of the following electron configurations represents Cobalt?

• 1s²2s²2p⁶3s²3p⁶4s²3d⁶

• 1s²2s²2p⁶3s²3p⁶4s²

• 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹

• 1s²2s²2p⁶3s²3p⁶4s²3d⁷

What is the maximum number of electrons can an orbital hold?

• 2

• 4

• 8

• 10

Which of the following elements is in the s-block?

• Nitrogen

• Helium

• Oxygen

• Neon

The planetary model of the atom was proposed by

• E. Rutherford

• Democritus

• N. Bohr

• J. Dalton