Across
- 3. Arranged elements in order of increasing atomic number
- 4. Sodium ion has what charge
- 5. Elements in group one of the periodic table
- 9. Transition metal in period six, group six
- 12. Poor conductors of heat
- 16. Helium
- 17. Outermost electrons of an atom
- 19. Very malleable element
- 21. Metalloid in period three
- 23. Diagram that uses dots and lines
- 24. elements with properties intermediate between metals and nonmetals
Down
- 1. Elements in group 18 of the periodic table
- 2. Florine Ian has what charge
- 6. Elements in group on the periodic table from lanthanum to lutetium
- 7. Essentially nonreactive
- 8. Elements in group two of the periodic table
- 10. Alkali metal in period four
- 11. Elements in group three through twelve of the periodic table
- 13. React with water from bases
- 14. Elements in group 15 on the periodic table from actinium to lawrencium
- 15. Who made the first periodic table
- 18. Highly reactive,non-metalic metals in group 17 of the periodic table
- 20. First person who developed a periodic table by increasing atomic mass
- 22. Magnesium ion has what charge