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
    CC
  • B
    C2+C
  • C
    C2+C
  • D
    CC
  • E
    C2+C

Q2:

What is the formal charge of I in ICl4?

  • A2
  • B0
  • C1
  • D1+
  • E2+

Q3:

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

  • A+1, +1
  • B1, +1
  • C+1, 1
  • D1, 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
  • B1
  • C2+
  • D1+
  • E2

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