Across
- 2. chemical unit, be it atoms, molecules, ions.
- 3. a pure single form of matter
- 6. small portion of matter.
- 8. Mass of one mole of a substance.
- 9. any substance that can not be decomposed into a simpler substance.
- 10. that results from the sharing of an electron pair between two atoms.
Down
- 1. the reactant in a chemical reaction with a greater amount
- 4. chemical reaction using symbols of the elements to indicate the amount of substance, usually in moles, of each reactant and product.
- 5. proportions and of the conservation of mass and energy to chemical activity
- 7. a substance that is present at the start of a chemical reaction