Identifying Elements with Electron Configurations

The video tutorial explains two main methods to identify an element on the periodic table using its electron configuration. The first method involves counting the total number of electrons to find the atomic number, which corresponds to the element nickel. The second method uses orbital blocks to determine the element by analyzing the electron configuration's ending. The tutorial also covers the condensed electron configuration notation using noble gases. Both methods confirm that the element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d8 4s2 is nickel.

What is the electron configuration that ends in 3d8 4s2 used to identify?

• The number of neutrons in an element

• The element's electron affinity

• The element's position in the periodic table

• The element's atomic mass

How many total electrons are present in the electron configuration ending in 3d8 4s2?

• 48

• 28

• 38

• 18

Which element is represented by the atomic number 28?

• Nickel

• Copper

• Iron

• Zinc

What is the noble gas used in the condensed electron configuration for Nickel?

• Xenon

• Krypton

• Argon

• Neon

In the condensed electron configuration, where is the 4s2 typically placed?

• Before 3d8

• After 3d8

• Between 3d8 and 3p6

• At the end of the configuration

What is the second method to identify elements using electron configurations?

• Counting protons

• Using orbital blocks

• Counting neutrons

• Using atomic mass

Which orbital block does the electron configuration 3d8 4s2 belong to?

• s-block

• p-block

• d-block

• f-block

How many electrons can the 2p orbital hold?

• 6

• 4

• 2

• 8

What is the significance of the number of protons in an element?

• It is equal to the number of electrons in a neutral atom

• It determines the element's melting point

• It determines the element's atomic mass

• It determines the element's chemical properties

What is the main focus of the video tutorial?

• Studying the history of the periodic table

• Learning about atomic mass

• Identifying elements using electron configurations

• Understanding chemical reactions