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