Electron Configuration and Selenium Properties

This video tutorial explains how to write the electron configuration for selenium (SE) and its ion SE2-. It begins with an introduction to electron configuration, followed by a detailed explanation of how to determine the configuration for selenium using the periodic table. The video also covers the use of condensed notation and how to adjust the configuration for the SE2- ion by adding two electrons. The tutorial provides a clear and structured approach to understanding electron configurations.

What is the main objective of the video?

• To study the properties of noble gases

• To write the electron configuration for selenium and its ion

• To learn about the periodic table

• To understand chemical bonding

How many electrons does selenium have?

• 16

• 34

• 18

• 28

Which method is NOT mentioned for writing electron configurations?

• Using a chart with arrows

• Using molecular orbital theory

• Using periodic table blocks

• Using the diagonal rule

What is the first step in writing the electron configuration using periodic table blocks?

• Jump to the 4p orbital

• Use the noble gas configuration

• Begin with the 1s orbital

• Start with the 3d orbital

How many electrons can the s orbitals hold?

• 8

• 4

• 6

• 2

What is the electron configuration for selenium's 4p orbital?

• 4p1

• 4p2

• 4p4

• 4p6

What is the condensed notation for selenium's electron configuration based on?

• Neon

• Helium

• Argon

• Krypton

How many additional electrons does the Se2- ion have compared to neutral selenium?

• One

• Two

• Three

• Four

What is the electron configuration for the Se2- ion's 4p orbital?

• 4p6

• 4p4

• 4p5

• 4p2

What does the 2- charge on Se2- indicate?

• Two more electrons

• Two fewer electrons

• Two fewer protons

• Two more protons