Problem: Write Lewis structure that obey the octet rule for the following molecules and ions. (In this case the first atom listed is the central atom.c. ClO2-, SCl2, PCl2-Considering your answers to parts a, b, and c, what conclusions can you draw concerning the structures of species containing the same number of atoms and the same number of valence electrons?

FREE Expert Solution

Recall that the octet rule states that an element is surrounded by eight electrons in the Lewis structure. 


Exceptions to this rule occur when:

• there is an odd number of electrons, like in radicals

• there are less than 8 electrons or incomplete octet

• there are more than 8 electrons or expanded octet. This occurs to nonmetals from Period 3 to 7.


ClO2- → Cl is the central atom


Total number of valence electrons:


                    Valence Electrons

Cl                   1 × 7 e7 e

O                    2 × 6 e12 e

From -1 charge:      Add: 1 e

Total:  20 valence e


Lewis Structure: (does not obey octet rule)

  • Halogens (when the central atom) have an expanded octet 
  • O prefers to form 2 bonds

O's: 8 val eeach, Cl: 10 val e-


79% (428 ratings)
View Complete Written Solution
Problem Details

Write Lewis structure that obey the octet rule for the following molecules and ions. (In this case the first atom listed is the central atom.


c. ClO2-, SCl2, PCl2-


Considering your answers to parts a, b, and c, what conclusions can you draw concerning the structures of species containing the same number of atoms and the same number of valence electrons?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Lewis Dot Structures: Neutral Compounds concept. You can view video lessons to learn Lewis Dot Structures: Neutral Compounds. Or if you need more Lewis Dot Structures: Neutral Compounds practice, you can also practice Lewis Dot Structures: Neutral Compounds practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Rocher's class at OU.