Worksheet: Formal Charge

In this worksheet, we will practice determining the formal charge of an atom in a molecule or ion from its valency and electron count in Lewis diagrams.

Q1:

Which of the following is the correct Lewis structure for C22+?

  • A
    C C
  • B
    C 2 + C
  • C
    C 2 + C
  • D
    C C
  • E
    C 2 + C

Q2:

What is the formal charge of I in ICl4?

  • A 2
  • B0
  • C 1
  • D1+
  • E2+

Q3:

What are the formal charges on the nitrogen and boron atoms in HNBH33?

  • A + 1 , + 1
  • B 1 , + 1
  • C + 1 , 1
  • D 1 , 1

Q4:

What is the formal charge of Br in BrCl3?

Q5:

In the nitrite ion structure shown, what is the formal charge of the nitrogen atom? ONO

  • A0
  • B 1
  • C 2 +
  • D 1 +
  • E 2

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