Know the elements of Periodic table

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Across
  1. 1. has an exceptional ability to bind with a wide variety of other elements.
  2. 3. Used extensively in rechargeable batteries, added to fireworks to make red sparks.
  3. 6. all the elements.
  4. 8. occurs in gemstones like aquamarine, emerald. Is desirable as aerospace material for aircraft components.
  5. 9. Most abundant element in the universe
  6. 10. is highly unreactive and used in light bulbs.
Down
  1. 2. both animals and plants require it; is the 3rd most abundant element in the universe. Is present approximately 2/3rd of the mass of human body.
  2. 4. second lightest and abundant elements in the universe.
  3. 5. is the second hardest element behind carbon (in its diamond form). Its bright green flame properties are used in fireworks.
  4. 7. is the most reactive and most electro-negative