Definitions - Atoms and Reactions

Across

• 1. the mass per mole of a substance, unit g per mole (5, 4)
• 4. a small group of atoms held together by covalent bonds (8)
• 5. a species that is a proton acceptor (4)
• 8. the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon-12 isotope (4)
• 9. any chemical compound formed from an acid when a H+ ion from the acid has been replaced by a metal ion or another positive ion, such as the ammonium ion (NH4+) (4)
• 10. the volume per mole of a gas (dm3 mol-1); at room temperature and pressure the molar volume is approximately 24.0dm3 mol-1 (5, 6)