Periodic table

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Across
  1. 3. There are 2 of these atoms in water
  2. 4. milk
  3. 6. bananas
  4. 8. This is a common metal which is used in construction, and also household items, like skillets
  5. 11. S
  6. 12. it can be used as a propellant in ion engines
  7. 13. This is used to make batteries
  8. 14. one of the elements to make table salt
Down
  1. 1. a neutron reflector and moderator in nuclear reactors
  2. 2. Used for green coloring in barium
  3. 4. This is used in pools to disinfect them, Cl
  4. 5. is high in leafy greens, legumes and nuts
  5. 7. this is used in atomic clocks, also known as Cs
  6. 9. This has a 22 min long half life, high radioactivity, and very rare
  7. 10. This also has very high radioactivity and is used in self-luminous paints for watches and instruments