Across
- 2. Amount of substance containing Avogadro’s number of particles.
- 6. The isotope used as the standard for atomic mass. (6,6)
- 7. A negatively charged ion.
- 9. Compound formed when magnesium reacts with oxygen. (9,5)
- 11. The fixed numerical relationship of atoms in a compound (e.g., KI is 1:1).
- 14. What non-metal atoms do with electrons when they form covalent bonds.
- 15. Chemical formula for magnesium oxide.
- 17. The number of electrons an atom uses to bond.
- 18. Symbol Mr; mass of a molecule compared to ¹²C/12. (8,9,4)
- 21. Calculating reacting amounts using balanced equations.
- 23. What Group 7 non-metals do to electrons to form negative ions.
- 24. A positively charged ion.
- 25. Substances you start with in a chemical reaction.
Down
- 1. A substance made from two or more elements chemically joined.
- 3. Principle stating matter cannot be created or destroyed.
- 4. Mr for ionic compounds with no molecules. (8,7,4)
- 5. The name fluorine takes when it becomes an ion or forms a compound.
- 8. Subatomic particle that differs between isotopes.
- 10. What (aq) means; dissolved in water. (7,8)
- 12. Relative molecular mass of water (H₂O).
- 13. (s), (l), (g), (aq) in chemical equations. (5,7)
- 16. Symbol Ar; weighted average mass of an element’s atoms. (8,6,4)
- 19. Atoms of the same element with different numbers of neutrons.
- 20. What Group 2 metals do to 2 of their electrons when bonding.
- 22. Substances formed at the end of a reaction.