chemistry - elements

• what is an element?

  a substance that is made up from only 1 type of atom
• what are the two types of compound called?

  Ionic and covalent
• what is an ion?

  an atom or molecule that has gained or lost one or more electrons
• what are metals charge?

  positive
• what are non-metals charge?

  negative
• nitrate charge?

  NO3-
• hydroxide charge?

  OH-
• Carbonate charge?

  CO3 2-
• Sulphate charge?

  SO4 2-