Electron Configurations and Periodic Table Blocks

What is a common characteristic of elements in the same column of the periodic table?

• They have the same number of protons.

• They have the same number of neutrons.

• Their highest energy electron is in the same sublevel.

• They have the same atomic mass.

What is the electron configuration of helium?

• 2s2

• 2s1

• 1s2

• 1s1

Which element has the electron configuration 2s1?

• Hydrogen

• Helium

• Lithium

• Beryllium

What is the highest energy electron configuration for beryllium?

• 1s2

• 2s1

• 2s2

• 2p1

What is the electron configuration of boron?

• 1s2 2s2 2p1

• 1s2 2s2 2p2

• 1s2 2s2 2p3

• 1s2 2s1 2p1

How many electrons does sodium have?

• 10

• 13

• 11

• 12

What is the highest energy electron configuration for elements in the first column of the periodic table?

• s1

• s2

• p1

• p2

Which block in the periodic table contains elements with their highest energy electron in the s sublevel?

• F block

• D block

• S block

• P block

What is the electron configuration of magnesium?

• 1s2 2s2 2p6 3p2

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6 3p1

How many electrons does magnesium have?

• 13

• 12

• 11

• 10