Chemistry

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Across
  1. 1. ______ is anything that has mass and occupies space
  2. 5. a pure substance containing only one kind of atom
  3. 8. a chemical gas with the symbol Ne and 0 valency
  4. 11. the Element used in swimming pools to keep it clean
  5. 12. type of gases which do not react
  6. 13. the central part of an atom that contains protons and neutrons
  7. 14. melting an ice cube is a _____ change
Down
  1. 2. What is the substance present inside normal light bulbs
  2. 3. the process by which a substance directly changes from its gaseous to solid state
  3. 4. Elements that have properties of both metals and non-metals
  4. 6. substances that are formed after the reaction of elements or compound
  5. 7. who is known as Father of Chemistry?
  6. 9. what is the 4th state of matter that is rare on the earth
  7. 10. identify me I am Mythological God, a celestial body and used to compute heat