Valence Electrons and Nitrate Ion

This video tutorial explains how to determine the number of valence electrons in the nitrate ion (NO3-). It begins by identifying the valence electrons for nitrogen and oxygen using the periodic table. Nitrogen, in group 15, has five valence electrons, while oxygen, in group 16, has six valence electrons. Since there are three oxygen atoms, their total is multiplied by three. An additional electron is added due to the negative charge of the ion, resulting in a total of 24 valence electrons. The video also briefly introduces how to draw the Lewis structure for NO3- and provides links for further assistance.

What is the charge of the nitrate ion (NO3-)?

• Neutral

• Double negative

• Negative

• Positive

How many valence electrons does nitrogen have?

• 7

• 6

• 5

• 3

Which group in the periodic table does oxygen belong to?

• Group 15

• Group 16

• Group 14

• Group 17

How many valence electrons are contributed by the three oxygen atoms in NO3-?

• 6

• 24

• 18

• 12

What is the total number of valence electrons in the nitrate ion?

• 20

• 22

• 24

• 26

What additional step is needed when calculating the total valence electrons for NO3- due to its charge?

• Divide by two

• Add one electron

• Subtract one electron

• Multiply by two

Where can you find help for drawing the Lewis structure of NO3-?

• In the textbook

• In the periodic table

• In the appendix

• In the video description