Yr 12 Valency PDF

# Yr 12 VALENCY Students should be able to recognise and write the formula of the following ions and molecules: | Ion name | Formula | Ion name | Formula | |--------------|---------|--------------------|-----------| | ammonium | NH₄⁺ | bromide | Br⁻ | | caesium...

# Yr 12 VALENCY Students should be able to recognise and write the formula of the following ions and molecules: | Ion name | Formula | Ion name | Formula | |--------------|---------|--------------------|-----------| | ammonium | NH₄⁺ | bromide | Br⁻ | | caesium | Cs⁺ | chloride | Cl⁻ | | hydrogen | H⁺ | cyanide | CN⁻ | | lithium | Li⁺ | dihydrogenphosphate | H₂PO₄⁻ | | potassium | K⁺ | ethanoate (acetate) | CH₃COO⁻ | | rubidium | Rb⁺ | fluoride | F⁻ | | silver | Ag⁺ | hydrogencarbonate | HCO₃⁻ | | sodium | Na⁺ | hydrogensulfate | HSO₄⁻ | | barium | Ba²⁺ | hydroxide | OH⁻ | | calcium | Ca²⁺ | iodide | I⁻ | | cobalt(II) | Co²⁺ | nitrate | NO₃⁻ | | copper(II) | Cu²⁺ | nitrite | NO₂⁻ | | iron(II) | Fe²⁺ | permanganate | MnO₄⁻ | | lead(II) | Pb²⁺ | carbonate | CO₃²⁻ | | magnesium | Mg²⁺ | chromate | CrO₄²⁻ | | manganese(II)| Mn²⁺ | dichromate | Cr₂O₇²⁻ | | nickel(II) | Ni²⁺ | hydrogenphosphate | HPO₄²⁻ | | strontium | Sr²⁺ | oxalate | C₂O₄²⁻ | | zinc | Zn²⁺ | oxide | O²⁻ | | aluminium | Al³⁺ | sulfate | SO₄²⁻ | | chromium(III)| Cr³⁺ | sulfide | S²⁻ | | iron(III) | Fe³⁺ | sulfite | SO₃²⁻ | | | | nitride | N³⁻ | | | | phosphate | PO₄³⁻ | ## Common molecules that have non-systematic names: | Molecule name | Formula | |-------------------|---------| | ammonia | NH₃ | | water | H₂O | | hydrogen peroxide | H₂O₂ | | ethanoic acid | CH₃COOH | | hydrochloric acid | HCl | | nitric acid | HNO₃ | | carbonic acid | H₂CO₃ | | sulfuric acid | H₂SO₄ | | sulfurous acid | H₂SO₃ | | phosphoric acid | H₃PO₄ |