Magnesium

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1. Group IIA, alkaline earth metals
   1. barium (Ba)
   2. strontium (Sr)
   3. calcium (Ca)
   4. radium (Ra).
   5. beryllium (Be)
2. Symbol: Mg
3. Sources:
   1. in nature only found in combined state
      1. e.g. Magnesite; dolomite
      2. in fish, and green vegetables
4. Uses:
   1. Burning magnesium - light for flashes and fireworks
   2. insulation
   3. milk of magnesia
5. Name comes from:
   1. Mineral Magnesia, the name of a district in Ancient Greece
6. Atomic number: 12
   1. Number of protons: 12
   2. Number of electrons: 12
   3. Number of neutrons: 12
   4. Atomic mass: 24.305