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Chemistry (Key Terms (An Element (One type of atom), A Compound (One or…

- - - - Amount of protons
  - - - The sum of the neutrons and electrons
  - - - Isotopes are atomss of the same element with a different number of neutrons.
  - - - Electrical current flow which can separate compounds
- - - - iron oxide + carbon → iron + carbon dioxide
- - - - Lower down the group one metal, the more reactive it is
        
        All group 1 alkali have one electron in their outer shell. In potassium, the electron is further from the nucleus(The nucleus has a positive charge). This means the electron is easier to get rid of.
- - - - e.g. Lithium+water->lithium hydroxide+hydrogen
  - - - If the metal is more reactive than the reaction, it replaces it