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