periodic

2. Found along the 'staircase'. Have properties of both metals and nonmetals
4. brittle , dull, poor conductors of heat and electricity; located on the right side of the periodic table
5. vertical columns on the periodic table that have common
7. Positively charged particle in the nucleus of an atom
9. Also known as families
11. of an atom

1. A tiny, negatively charged particle that moves around the
3. the smallest unit of an element that maintains the properties of that element
4. of an atom
6. horizontal rows on the periodic table
8. A subatomic particle that is neutral and that is found in the
10. pure substance that consists entirely of one type of atom