Valence Electrons in NO2 and NO2-

The video tutorial explains how to determine the number of valence electrons for NO2 and NO2- using the periodic table. It highlights the process of calculating valence electrons for nitrogen dioxide (NO2), which has an odd number of electrons, and the nitrite ion (NO2-), which has an even number due to an extra electron. The tutorial also touches on drawing Lewis structures for both molecules, providing links for further assistance.

Which group in the periodic table contains elements with one valence electron?

• Group 16

• Group 15

• Group 2

• Group 1

How many valence electrons does nitrogen have in NO2?

• 7

• 6

• 5

• 3

What is unusual about the number of valence electrons in NO2?

• It is an even number

• It is a prime number

• It is an odd number

• It is a multiple of 10

What is the total number of valence electrons in NO2?

• 17

• 18

• 16

• 15

What is the main challenge when drawing the Lewis structure for NO2?

• Distributing an even number of electrons

• Distributing an odd number of electrons

• Finding the correct molecular shape

• Balancing the charges

What is the charge on the nitrite ion (NO2 minus)?

• 2-

• 1-

• 1+

• 2+

How does the extra electron in NO2 minus affect its total valence electrons?

• It decreases the total by one

• It has no effect

• It doubles the total

• It increases the total by one

What is the total number of valence electrons in NO2 minus?

• 17

• 16

• 18

• 19

Why is it easier to draw the Lewis structure for NO2 minus compared to NO2?

• It has fewer atoms

• It has an even number of electrons

• It has a positive charge

• It has a simpler shape

What is the main benefit of having an even number of valence electrons in NO2 minus?

• Easier distribution in the Lewis structure

• More stable molecule

• Simpler molecular geometry

• Easier to balance charges