Across
- 1. electrons numbers of electrons in the outermost shell.
- 3. elements react and have properties that are similar.
- 4. The basic unit of matter, makes up everything.
- 7. used to separate liquid mixtures
- 9. change does not form a new substance.
- 12. Do not add mass to the atom, has a negative charge.
- 14. All of the elements to the left of the staircase.
- 16. used to separate a liquid to solid mixture.
- 17. An electrically charged element formed from the movement of electrons.
- 18. a positively charged particle.
- 20. composed of two or more compounds physically combined.
Down
- 2. A substance made of two or more elements, chemically combined.
- 5. touching the staircase line, properties of both metals and non-metals.
- 6. everything to the right of the staircase line.
- 8. Pure substances that can not be broken down by chemical means.
- 10. change when a chemical is changed into a new substance chemically.
- 11. Add mass to the atom, have no charge.
- 13. used to separate a solid to solid mixture.
- 15. number Tells you the number of protons.
- 19. rule Atoms will always react until they have a full shell.