Lewis structure of ClO3-

Step method to draw lewis structure of perchlorate ion

Step 1: Find valence e- for all atoms. Add them together.

Cl:7
O:6x3=18

Total=25+1=26*

* add an electron to the total since the molecule has -1 charge on it.

Step2: Find octet e- for each atom and add them together.

Cl:8
O=8x3=24

Total=32

Step3: Gives you bonding e-. Subtract step 1 total from step 2

32-26=6e-

Step 4: Find number of bonds by diving the number in step 3 by 2(because each bond is made of 2 e-)

6e-/2= 3 bond pairs

Step 5: Find the number of nonbonding (lone pairs) e-. Subtract step 3 number from step 1.

26-6= 20e-=10 lone pair

Use information from step 4 and 5 to draw the lewis structure.

CLO# ion lewis structure

Lewis dot structure of ClO3-

Alternatively a dot method can be used to draw the lewis structure.
Calculate the total valence electrons in the molecule.
Cl:7
O:6x3=18

Total=25+1=26*

Put chlorine in center and arrange oxygen atoms on the sides.Arrange electrons until each atom get 8 electrons.
CLO3 lewis dot structure

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