Chemistry
Grade-9
Easy

Question

When writing the chemical formula of a compound that contains more than one of a particular polyatomic ion, _____ must be used.

  1. Ionic charges
  2. Parenthesis
  3. Greek prefixes
  4. Lower case letters

hintHint:

Parentheses are used in molecules with multiple polyatomic ions.

The correct answer is: Parenthesis


    • Parentheses are very often used in chemical formulae.
    • Parentheses are used to form subgroups of atoms within a molecule.
    • When writing the chemical formula of a compound that contains more than one of a particular polyatomic ion, parenthesis must be used.

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