Across
- 5. the temperature at which a substance melts
- 6. metallic elements that occupy the largest part of the periodic table
- 8. a model that shows how the electrons circle the nucleus
- 11. the ability of a substance to be hammered or pressed into a shape without breaking
- 14. a substance made by mixing other substances together
- 16. the mass of a chemical element
- 18. a substance that is formed when two or more chemical elements are chemically bonded together
- 19. a subatomic particle with a positive charge
Down
- 1. change that affects the form of a chemical substance but not its chemical composition
- 2. gascous element occupying group 18 of the periodic table
- 3. change that results with the formation of new substances
- 4. the basic unit of life
- 7. elements that have properties of metals and non-metals
- 8. the temperature at which a substance boils
- 9. Table a table that organizes the elements according to their number of protons
- 10. a substance particle with a negative charge
- 12. a subatomic particle that doesn't have a charge
- 13. a part of science that deals with the identifications and properties of matter
- 15. a substance of atoms which have the same number of protons
- 17. a group of atoms that have the same chemical compound