Identifying Elements and Electron Configurations

The video tutorial explains how to determine which element on the periodic table corresponds to a given electron configuration, specifically 1s2 2s2 2p6 3s2. It presents two methods: counting the total number of electrons to match the atomic number and using orbital blocks to identify the element. Both methods lead to the conclusion that the element is magnesium, which has an atomic number of 12. The tutorial provides a clear explanation of electron configurations and how they relate to the periodic table.

What is the main goal of the video tutorial?

• To understand the history of the periodic table

• To identify an element based on its electron configuration

• To learn about chemical reactions

• To explore the properties of metals

How many electrons are present in the given electron configuration?

• 10

• 11

• 12

• 13

Which element has an atomic number of 12?

• Sodium

• Silicon

• Aluminum

• Magnesium

What is the significance of the number 12 in the context of the video?

• It is the number of protons and electrons in the element

• It is the number of valence electrons

• It is the atomic mass of the element

• It is the number of neutrons in the element

What is the maximum number of electrons that the s orbital can hold?

• 4

• 8

• 2

• 6

Which orbital block can hold up to 10 electrons?

• s

• d

• f

• p

What is the electron configuration that ends in 3s2?

• 1s2 2s2 2p6 4s2

• 1s2 2s2 2p6 3d2

• 1s2 2s2 2p6 3p2

• 1s2 2s2 2p6 3s2

Which method involves using the periodic table's orbital blocks?

• Using valence electrons

• Using orbital blocks

• Using atomic mass

• Counting electrons

What is the final conclusion of the video?

• The element is silicon

• The element is aluminum

• The element is magnesium

• The element is sodium