Charges on Ions

• What charge do metal ions typically have?

  Positive
• What charge do most non-metal ions have?

  Negative
• How can charges on ions be related to the periodic table?

  The charge on a metal ion often corresponds to its group number
• What is the general pattern for the charges of metal ions in the periodic table?

  • Sodium (Na) in group 1 forms Na⁺
  • Magnesium (Mg) in group 2 forms Mg²⁺
  • Aluminium (Al) in group 3 forms Al³⁺
• What ions do lithium and potassium form?

  One plus ions
• What ions do beryllium and calcium form?

  Two plus ions
• What ions do gallium and indium form?

  Three plus ions
• Why do transition metals differ from other metals in terms of ion charges?

  They can form several different ions
• What are the charges of iron ions?

  Iron can form a two plus ion and a three plus ion
• What are the charges of copper ions?

  Copper can form a one plus ion and a two plus ion
• What is the charge of the oxide ion?

  Two minus
• What is the charge of the fluoride ion?

  One minus
• How does the charge of oxygen relate to its group in the periodic table?

  Oxygen is in group six and forms a two minus ion
• What ions do sulfur and oxygen form?

  Sulfur forms a two minus ion and oxygen forms a two minus ion
• What charge do chlorine and bromine ions have?

  One minus
• What are polyatomic ions?

  They consist of several non-metal atoms chemically combined
• What is the charge of the hydrogen ion?

  One plus
• What is the charge of the ammonium ion?

  One plus
• What are the formulas of the ionic compounds sodium sulfate and calcium hydroxide?

  • Sodium sulfate: Na₂SO₄
  • Calcium hydroxide: Ca(OH)₂
• What skill will be developed in the next video related to ionic compounds?

  Working out the formula of ionic compounds
• What should you be able to describe by the end of the video?

  How metal ions are positive and most non-metal ions are negative
• What is the relationship between the charges on ions and their groups in the periodic table?

  Charges on ions can be relayed to their respective groups