Understanding Scandium's Electron Configuration

The video tutorial explains how to write the electron configuration for scandium (Sc). It begins by identifying scandium as a neutral element with 21 electrons, using the periodic table to determine its electron configuration. The process is detailed step-by-step, starting from 1s2 and ending with 3d1. The video also covers the condensed electron configuration using argon as the noble gas. The tutorial concludes with a summary of the electron configuration for scandium.

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

• 20, it has 20 electrons

• 19, it has 19 electrons

• 21, it has 21 electrons

• 22, it has 22 electrons

Why is it useful to use the periodic table when determining electron configurations?

• It shows the number of neutrons

• It lists all isotopes

• It helps understand electron patterns

• It provides the atomic mass

What is the electron configuration for scandium up to the 2p orbital?

• 1s2 2s2 2p6

• 1s2 2s2 2p3

• 1s2 2s2 2p4

• 1s2 2s2 2p5

After filling the 3p orbital, which orbital is filled next in scandium's electron configuration?

• 3d

• 4s

• 3s

• 4p

What is the final electron configuration for scandium?

• 1s2 2s2 2p6 3s2 3p6 4s2 3d2

• 1s2 2s2 2p6 3s2 3p6 4s1 3d2

• 1s2 2s2 2p6 3s2 3p6 3d2 4s1

• 1s2 2s2 2p6 3s2 3p6 4s2 3d1

What is the significance of the 3d1 term in scandium's electron configuration?

• It indicates the start of the 4th period

• It is the last electron in the 3p subshell

• It shows the first electron in the 3d subshell

• It represents the last electron in the 4s subshell

What is the noble gas notation for scandium?

• [Kr] 4s2 3d1

• [He] 2s2 2p6 3s2 3p6 4s2 3d1

• [Ar] 4s2 3d1

• [Ne] 3s2 3p6 4s2 3d1

Why is the condensed electron notation useful?

• It simplifies the configuration by using noble gases

• It shows the exact number of electrons

• It lists all isotopes

• It highlights the atomic mass

Which noble gas is used in the condensed electron notation for scandium?

• Helium

• Krypton

• Neon

• Argon

What is the main takeaway from the video on scandium's electron configuration?

• Understanding the role of protons

• Identifying isotopes of scandium

• Grasping the electron configuration process

• Learning the importance of atomic mass