Chemistry Revision

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Across
  1. 1. What is the type of matter which is composed of two or more chemically bonded elements?
  2. 5. What is the name of the reaction when iron corrodes?
  3. 6. What type of matter does periodic table list?
  4. 7. Earth's air is composed by 78% if this gas.
  5. 9. Carbon dioxide is in this family, one which traps heat from the sun inside the Earth's atmosphere, What is the name of the gas family?
  6. 13. What type of formation is a group of atoms that are chemically bonded called?
  7. 14. What is the smallest type of particle?
  8. 15. A type of particle that is either positively or negatively charged.
  9. 16. The most common greenhouse gas.
Down
  1. 2. Earth's air is composed by 21% of this gas.
  2. 3. What type of matter is composed of two or mote elements but which are not chemically bonded?
  3. 4. What name is used to remember the 3 requirements for fire?
  4. 8. What is the scientific name for burning?
  5. 10. What type of reaction is one which draws energy from it's surroundings?
  6. 11. What type of reaction is one that real eases energy to it's surroundings?
  7. 12. What is the name of the method in which zinc covering is used to strengthen and stop rusting in metals?