Across
- 4. 6.02 x 10^23
- 7. the simplest structural unit of an element or compound
- 8. arrangement of chemical elements according to atomic number
- 9. anything that takes up space and can be weighed
- 10. the metals of group I of the periodic table
Down
- 1. a type of reaction in which multiple reactants combine to form a single product
- 2. atoms of two or more different elements joined by chemical bonds
- 3. an electron in the outer shell of an atom which can combine with other atoms to form molecules
- 5. containing or involving electrically charged particles
- 6. occurring or formed with the release of heat
- 11. the mass of an atom of a chemical element expressed in atomic mass units.