Common Polyatomic Ions

• What do polyatomic ions need to be learnt?

  They need to be memorized
• What numeral system is mentioned in the study material?

  Roman numerals
• What are some common polyatomic ions and their formulas?

  • Hydroxide: HO
  • Carbonate: CO$_3^{2-}$
  • Sulfate: SO$_4^{2-}$
  • Nitrate: NO$_3^{-}$
  • Ammonium: NH$_4^{+}$
• What is the formula for Silver (I)?

  Ag
• What is the formula for Copper (II)?

  Cu$^{2+}$
• What is the formula for Iron (II)?

  Fe$^{2+}$
• What is the formula for Iron (III)?

  Fe$^{3+}$
• What is the formula for Lead (II)?

  Pb$^{2+}$
• What is the formula for Zinc (II)?

  Zn$^{2+}$
• What is the formula for Hydrogen in groups 1, 2, 3, 5, 6, and 7?


  H
• What happens to elements in groups 1, 2, 3, 5, 6, and 7?

  They lose electrons to form positive ions
• What is the charge of Copper (II) ions?

  2+
• What is the charge of Iron (II) ions?

  2+