Across
- 3. Excess acid build-up neutraliser
- 6. short hand abbreviations for element names.
- 11. Chemicals that change colour when added to an acid or base
- 12. when the nucleus loses a neutron.
- 13. a feature of certain types of atoms
- 14. the average mass of the atoms in an element
- 15. The opposite of an acid
- 16. a liquid that releases positively charged ions.
- 18. the number of protons in the nucleus of an atom
Down
- 1. the product of two correct substances mixing.
- 2. Water -> Hydrogen + Oxygen. That is a ... Reaction
- 4. an exothermic chemical reaction
- 5. When acid is added to a base.
- 7. PH
- 8. Name of the periodic table developer
- 9. many of naturally occurring elements are :
- 10. Oxygen + Hydrogen -> Water. That is a ... Reaction
- 17. The ........ Table