Electron Configuration of Common Ions

This video tutorial explains how to write electron configurations for ions, focusing on Mg2+, P3-, Fe2+, and Fe3+. It covers the basics of electron sublevels and the process of adding or removing electrons based on the ion's charge. The tutorial emphasizes the importance of considering the highest energy level when adjusting electron counts for cations and anions.

What is the first step in writing the electron configuration of an ion?

• Identify the number of neutrons.

• Write the electron configuration of the neutral atom.

• Find the ion's position in the periodic table.

• Determine the ion's charge.

How many electrons can the 'p' sublevel hold?

• 6

• 14

• 2

• 10

When writing the electron configuration for Mg2+, from which shell are the electrons removed?

• First shell

• Second shell

• Fourth shell

• Third shell

What is the electron configuration of the Mg2+ ion?

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6 3s2 3p6 3d10

• 1s2 2s2 2p6

• 1s2 2s2 2p6 3s2 3p6

How many more electrons does the phosphide ion (P3-) have compared to a neutral phosphorus atom?

• 4

• 3

• 2

• 1

What is the total number of electrons in the phosphide ion (P3-)?

• 16

• 17

• 15

• 18

Which sublevel do you stop at when writing the electron configuration for a neutral phosphorus atom?

• 3p

• 4s

• 3s

• 2p

When writing the electron configuration for Fe2+, from which sublevel are the electrons removed first?

• 3d

• 4s

• 2p

• 3p

What is the electron configuration of the Fe2+ ion?

• 1s2 2s2 2p6 3s2 3p6 4s0 3d6

• 1s2 2s2 2p6 3s2 3p6 4s0 3d5

• 1s2 2s2 2p6 3s2 3p6 4s2 3d6

• 1s2 2s2 2p6 3s2 3p6 3d6

How many electrons are removed to form the Fe3+ ion?

• 1

• 2

• 3

• 4