Electron Configuration and Sodium Ions

The video tutorial explains how to write the electron configuration for the sodium ion (Na+). It begins by detailing the electron configuration for a neutral sodium atom (Na) and then describes how to adjust this configuration to account for the loss of an electron, resulting in Na+. The tutorial highlights the stability achieved by Na+ having the same electron configuration as the noble gas neon. The video concludes with a summary of the process and its significance in chemical bonding.

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

• Determine the number of neutrons in Na.

• Write the electron configuration for neutral Na.

• Find the atomic mass of Na.

• Identify the valence electrons of Na+.

Why are elements on the periodic table considered neutral?

• They have a full outer shell.

• They have no charge.

• They have equal numbers of protons and electrons.

• They have equal numbers of protons and neutrons.

How many electrons does a neutral sodium atom have?

• 12

• 11

• 10

• 13

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

• 3s

• 2s

• 2p

• 1s

What is the electron configuration for neutral sodium?

• 1s² 2s² 2p⁶ 3p¹

• 1s² 2s² 2p⁶

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 3s¹

What happens to the electron configuration when sodium becomes Na+?

• It gains an electron.

• It loses an electron.

• It loses a proton.

• It gains a proton.

How does the electron configuration of Na+ compare to that of neon?

• It is more stable than neon.

• It has more electrons than neon.

• It is the same as neon.

• It is less stable than neon.

Why does sodium lose an electron to form Na+?

• To decrease its atomic mass.

• To increase its atomic number.

• To achieve a stable electron configuration.

• To become a noble gas.

What is the significance of a full second energy level in Na+?

• It makes Na+ unstable.

• It shows an incomplete shell.

• It indicates a loss of protons.

• It signifies a stable configuration.

What is the role of Dr. B in the video?

• To demonstrate the electron configuration for Na+.

• To explain the periodic table.

• To discuss chemical bonding.

• To describe the properties of noble gases.