Across
- 1. Good conductors of heat and electricity.
- 3. a stable particle with a negative electricity it found in all atoms and acting as the main carrier of electricity in solids.
- 4. a particle about the same mass as a proton but with no charge.
- 11. the number of protons in the nucleus of an atom.
- 12. a group of atoms bonded together.
- 13. A table filled with elements in order of atomic numbers.
- 14. a method of writing the chemical symbol of an element and surrounding it with dots to show the number of valence electrons.
- 17. the around a nucleus where electrons are found.
- 19. The vertical columns on the periodic table.
Down
- 1. a substance made by mixing other substances together.
- 2. The temperature when a solid turns to liquid .
- 5. able to dissolve other substances.
- 6. when a solid formed from a solution.
- 7. exploding
- 8. Horizontal rows of elements.
- 9. a stable particle occurring in all atoms it has positive charge.
- 10. it is a shorthand method of representing an element.
- 15. the amount of compactness in somthing.
- 16. The temperature when a liquid starts to vaporize.
- 18. The center of a atom.