Pre-IB Chemistry
Across
- 2. atomic mass average mass of the isotopes of an element.
- 4. number and type of different atoms in one molecule.
- 5. substance that reduces another substance.
- 8. strong electric attraction between oppositely charged ions.
- 10. loss of electrons.
- 12. simultaneous oxidation and reaction.
- 13. hypothesizes is first put forward by Amedeo Avogadro.
- 15. par of electrons which are both positive electrons.
- 16. compound is defined as the number of different atoms in one molecule.
- 17. gain of electrons.
- 18. chemical unit.
- 19. ions which are packed by regular arrangment.
- 20. soft material with slippery feel. It conducts energy.
Down
- 1. measured in g/dm3 or mol/dm3.
- 3. substance containing 6.02×10(small 23).
- 6. strong attraction between oppositely charged ions.
- 7. simplest whole number ratio of the different atoms in the compound.
- 9. very hard substance.
- 11. is used for ionic compounds.
- 14. substance which oxides another substance.