Across
- 2. amount of electrons in hydrogen
- 5. atomic number 109
- 7. unit for mass
- 10. what group are called halogens
- 11. a single covalent bond
- 12. what orbits the nucleus in shells?
- 13. chemical reaction that produces heat
- 16. it has no charge
- 17. current largest source of renewable energy in the electricity sector
Down
- 1. two or more atoms chemically bonded together
- 3. what variable is the one you measure
- 4. speeds up a reaction
- 6. a mixture of two or more metals
- 8. the particles are more spread out
- 9. atomic number of 62
- 14. surname of discoverer of the nucleus
- 15. word meaning unreactive