Periodic Table

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.

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.