Across
- 3. of the Periodic Table Dmitrimendeleev
- 5. this element has a melting point of 336.7
- 6. i am used in ballons
- 8. This element has an atomic mass of 32.06
- 9. The smallest unit of matter with all the properties of that substance
Down
- 1. the negatively charged particle in the electron cloud
- 2. A positively charged particles that make up a nucleus
- 4. the positively charged central part of an atom
- 6. the lightest thing on the periodic table
- 7. metal that is a liquid at romm tempature