Across
- 3. very low chemical reactivity
- 5. In the outer shell of an atom
- 8. when a substance combines with another to form a new substance
- 9. attraction between atoms
- 11. the mass of the system must remain constant over time, as system mass cannot change quantity if it is not added or removed
Down
- 1. the result of a chemical reaction.
- 2. when objects or substances undergo a change that changes the physical form of a composition but not the chemical composition
- 4. first colom of periodic table
- 6. symbolic representation of a chemical reaction in the form of symbols and formulas.
- 7. a way of expressing information about the proportions of atoms that constitute a particular chemical compound
- 10. a substance that takes part in and undergoes change during a reaction