Arsenic Electron Configuration Concepts

This video tutorial explains how to write the electron configuration for arsenic (As) using the periodic table and the diagonal rule. It covers the basics of electron configuration, the use of the periodic table's blocks, and the step-by-step process of writing the configuration for arsenic. Additionally, it discusses how arsenic forms the arsenide ion (As3-) by gaining three electrons to achieve a noble gas configuration.

What is the atomic number of arsenic, and how does it relate to its electron count?

• 15, which equals the number of protons in a neutral atom

• 33, which equals the number of protons in a neutral atom

• 15, which equals the number of electrons in a neutral atom

• 33, which equals the number of electrons in a neutral atom

Which blocks of the periodic table are used to determine the electron configuration of arsenic?

• d and f blocks only

• s and p blocks only

• s, p, and d blocks

• s, p, d, and f blocks

What is the electron configuration of arsenic?

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

• 1s2 2s2 2p6 3s2 3p6 4s2 3d5 4p3

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

How many electrons does the 3d subshell hold in the electron configuration of arsenic?

• 1

• 3

• 10

• 5

What happens to arsenic when it forms chemical bonds?

• It loses three electrons to form As3+

• It loses two electrons to form As2+

• It gains three electrons to form As3-

• It gains two electrons to form As2-

What is the electron configuration of the arsenide ion (As3-)?

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

Why does arsenic gain three electrons to form the arsenide ion?

• To increase its atomic number

• To become positively charged

• To achieve a noble gas configuration

• To decrease its atomic mass

What is the significance of the fourth energy level in the arsenide ion?

• It is partially filled, leading to instability

• It is empty, allowing for more electron gain

• It is half-filled, making it stable

• It is completely filled, giving a full outer shell

What is the main difference between the electron configurations of arsenic and the arsenide ion?

• The arsenide ion has a different number of protons

• The arsenide ion has a different atomic number

• The arsenide ion has three fewer electrons

• The arsenide ion has three more electrons

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

• Explaining the electron configuration of arsenic and arsenide ion

• Discussing the properties of noble gases

• Describing the periodic table layout

• Teaching chemical bonding theories