Electron Configuration and Sodium

This video tutorial explains how to write the electron configuration for the sodium ion (Na+). It begins by detailing the electron configuration for neutral sodium (Na) using the periodic table and orbital filling order. The tutorial then explains how the loss of an electron results in the Na+ ion, highlighting the stability achieved by having a full second energy level, similar to the noble gas neon. The video concludes by emphasizing the importance of electron configuration in understanding chemical bonding and stability.

What is the first step in writing the electron configuration for Na+?

• Write the configuration for Na-

• Write the configuration for neutral Na

• Directly write the configuration for Na+

• Count the number of neutrons in Na

Why are elements on the periodic table considered neutral?

• They have no charge

• They have more electrons than protons

• They have an equal number of protons and neutrons

• They have an equal number of protons and electrons

How many electrons does a neutral sodium atom have?

• 10

• 11

• 13

• 12

Which orbital is filled first when writing the electron configuration for sodium?

• 2s

• 2p

• 1s

• 3s

How many electrons can the 2p orbital hold?

• 6

• 4

• 2

• 8

What is the electron configuration for neutral sodium (Na)?

• 1s2 2s2 2p6 3p1

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p5 3s1

What does the plus sign in Na+ indicate?

• Loss of an electron

• Gain of a proton

• Loss of a proton

• Gain of an electron

How many electrons does Na+ have?

• 12

• 11

• 9

• 10

What is the electron configuration for Na+?

• 1s2 2s2 2p6

• 1s2 2s2 2p5

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6 3p1

Which noble gas has the same electron configuration as Na+?

• Krypton

• Helium

• Argon

• Neon