Electrons Unit

Choose the correct electron configuration for Beryllium (Be).

• 1s¹

• 1s² 2s²

• 1s² 2s² 2p¹

Choose the correct electron configuration for Chlorine (Cl).

• 1s² 2s² 2p¹

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s² 3p⁵

Choose the correct electron configuration for Nickel (Ni).

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹⁰

Choose the correct electron configuration for Krypton (Kr).

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s⁸ 3d⁸

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸ 4p3

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸ 4p⁶

What is the configuration for Carbon?

• 1s2 2p2

• 1s2 2s2 2p2

• 1s1 1s2 2s2 2p2

1s2 2s2 is which element?

• Lithium

• Beryllium

• Helium

• Boron

Which element is 1s2 2s2 2p6 3s2 3p6 4s2 3d7?

• Cobalt

• Nickel

• Manganese

• Chromium

Which element is 1s2 2s2 2p6 3s2 3p6 4s1?

• Sodium (Na)

• Lithium (Li)

• Potassium (K)

• Calcium (Ca)

Choose the correct element for 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

• Chlorine

• Bromine

• Krypton

• Sulfur

Choose the correct configuration for Neon (Ne).

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6

• 1s2 2s1 2p6