Sodium's Electrons and Valence Properties

This video tutorial explains how to determine the number of valence electrons in a sodium atom. It presents two methods: using the periodic table and writing the electron configuration. Sodium, located in group one of the periodic table, has one valence electron. The electron configuration method confirms this by showing that sodium's highest energy level contains one electron. The video concludes by summarizing these methods.

What is the main focus of the video?

• The structure of the periodic table

• The number of valence electrons in sodium

• The history of sodium

• The uses of sodium in industry

How can the periodic table help determine the number of valence electrons in sodium?

• By examining the period number

• By counting the total number of elements

• By checking the group number

• By looking at the atomic mass

Which group on the periodic table does sodium belong to?

• Group 17

• Group 18

• Group 2

• Group 1

What is the atomic number of sodium?

• 10

• 11

• 12

• 13

What is the electron configuration notation for sodium's valence shell?

• 3s¹

• 2p⁶

• 2s²

• 1s²

How many electrons are in the highest energy level of sodium?

• One

• Three

• Two

• Four

What is the total number of electrons in a neutral sodium atom?

• 10

• 12

• 13

• 11

Which energy level contains the valence electron in sodium?

• First

• Third

• Second

• Fourth

What conclusion is drawn about sodium's valence electrons?

• Sodium has two valence electrons

• Sodium has no valence electrons

• Sodium has one valence electron

• Sodium has three valence electrons