Periodic Table
Across
- 3. The smallest unit of an element that still has the properties of that element.
- 4. An element that's symbol is K.
- 5. An element that's symbol is Fe.
- 6. A subatomic particle with a neutral charge (no charge).
- 7. First person to develop an organized system for classifying elements.
- 11. Number of protons in a nucleus.
- 12. An element that's symbol is Au.
- 14. A subatomic particle with a negative charge.
- 17. An element that's symbol is Hg.
- 18. An element that's atomic number is 2.
- 19. An element that's symbol is Ag.
Down
- 1. An element that's symbol is Na.
- 2. A subatomic particle with a positive charge.
- 4. A table that shows the elements arranged by their atomic number.
- 8. A substance that conducts heat and electricty well and is malleable (easy to bend).
- 9. A substance made up of only one kind of atom.
- 10. An element that's atomic number is 1.
- 13. An element that's symbol is O.
- 15. An element that's symbol is Pb.
- 16. The center of every atom.