Valence Electrons and Phosphorus Properties

The video tutorial explains how to determine the number of valence electrons for phosphorus. It presents two methods: using the periodic table and writing the electron configuration. Phosphorus, found in group 15 of the periodic table, has 5 valence electrons. The electron configuration method confirms this by showing that the electrons in the highest energy level add up to 5. The video concludes by summarizing the findings.

What is the primary focus of this video?

• Determining the number of protons in phosphorus

• Determining the number of valence electrons in phosphorus

• Determining the atomic mass of phosphorus

• Determining the number of neutrons in phosphorus

In which group is phosphorus found in the periodic table?

• Group 10

• Group 5A

• Group 1

• Group 18

How many valence electrons does phosphorus have according to the periodic table?

• 7

• 8

• 5

• 3

What is the atomic number of phosphorus?

• 15

• 14

• 16

• 12

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

• 6

• 5

• 2

• 3

What is the electron configuration notation for the valence electrons of phosphorus?

• 3p⁶ 4s²

• 2s² 2p⁶ 3s²

• 3s² 3p³

• 1s² 2s² 2p⁶

What is the total number of valence electrons in phosphorus?

• 3

• 4

• 5

• 6