Across
- 2. group 1 elements (except Hydrogen) - most reactive metals on the periodic table
- 6. The number of protons in the nucleus of an atom of an element
- 7. The way a substance reflects light; shiny
- 8. able to be hammered into thin sheets
- 9. subatomic particles that are located the farthest shell away from the nucleus- determine bonding
Down
- 1. found along the 'staircase' have properties of both metals and nonmetals
- 3. A subatomic particle that is neutral and that is found in the nucleus of an atom
- 4. created one of the first periodic tables by using atomic mass
- 5. Group 17 nonmetals - all contain 7 valence electrons. highly reactive
- 10. element that maintains the properties of that element