Across
- 3. measure of an atom's ability to attract shared electrons to itself.
- 5. any of the six nonmetallic elements that constitute Group 17
- 8. the property of matter where it has more or fewer electrons than protons in its atoms
- 11. the outside part of an atom around the atomic nucleus.
- 12. patterns in elements on the periodic table
- 14. a substance that contains only one type of atom.
- 16. smallest part of a substance that cannot be broken down chemically
- 17. soft, silvery-white, metal part of the periodic table of the elements
- 18. colourless, odourless, tasteless, gaseous substance is the simplest member of chemical elements.
- 20. The temperature at which a substance undergoes a solid to liquid phase change
- 21. chemical element with symbol C and atomic number 6
Down
- 1. any of a group of rare gases that include helium, neon, argon, krypton, xenon.
- 2. the total distance from the nucleus of an atom to the outermost orbital of its electron.
- 4. chemical element with symbol Ca and atomic number 20.
- 6. nonmetallic element of Group 15 of the periodic table.
- 7. mass of a unit volume of a material substance
- 9. the electrons in the outermost shell, or energy level, of an atom
- 10. elements on the right of the periodic table, can be gases, liquids or solids.
- 13. the release of energy from the decay of the nuclei
- 15. stable subatomic particle with a charge of negative electricity.
- 19. Charge the total charge in the nucleus of all the protons