Periodic Table
Across
- 3. positive charge, inside the nucleus
- 6. model showing the number of electrons with dots
- 7. no charge, inside the nucleus
- 9. a charged element
- 10. creator of the current periodic table
- 13. an ion with more protons than electrons
- 14. most reactive non-metal family
- 16. 2 or more compounds physically combined
- 18. most reactive family
- 19. pure substance that can't be broken down
- 20. how many protons an element has
Down
- 1. total mass of an atom
- 2. a table made up of every element
- 4. electrons on the outer shell
- 5. model of an atom or elements
- 8. non-reactive, reacts with no other family
- 11. negative charge, outside the nucleus
- 12. an ion with more neutrons than protons
- 15. basic unit of matter
- 17. 2 or more chemically combined elements