wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

How to count formal charge in NO2-?


Open in App
Solution

Formal charge:-

  • Formal charge of a compound can be calculated by the formula:

FC=VNB2

  • Here, FC= Formal charge, V= number of valence electrons in a free atom, N= total number of non-bonding electrons, B= total number of bonding electrons

Formal charge of NO2-:-

  • Structure of NO2-is:

Step 1: Formal charge of Nitrogen

Here Nitrogen is the free atom and the number of valence electrons of it is 5.

Number of non-bonding electrons is 2 and bonding electrons are 6

Formal charge of Nitrogen is

FC=VNB2FC=5-2-(62)FC=5-5FC=0

Step 2: Formal charge of double-bonded Oxygen

Here oxygen is the free atom and the number of valence electrons of it is 6.

Number of non-bonding electrons is 4 and bonding electrons are 4

Formal charge of double bonded oxygen is

FC=VNB2FC=6-4-(42)FC=2-2FC=0

Step 3: Formal charge of single-bonded Oxygen

Here oxygen is the free atom and the number of valence electrons of it is 6.

Number of non-bonding electrons is 6 and bonding electrons are 2

Formal charge of single-bonded oxygen is

FC=VNB2FC=6-6-(22)FC=0-1FC=-1

Step 4: Formal charge of NO2-

Adding all the three different formal charges of Nitrogen and Oxygens we get the formal charge of NO2-

Formal charge of NO2-is

FC=0+0+(-1)FC=-1

Therefore, the formal charge of NO2- is -1


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Introduction to Chemical Bonding
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon