C1 0.0 / 5 ? ChemistryNanoscienceCrude oil, cracking and hydrocarbonsMetals, metal ores and alloysGCSEOCR Created by: beckymorris51Created on: 07-12-15 10:11 10962435187 Across 1. form negative ions as they gain electrons (3, 6) 4. elements that have atoms of the same atomic number but different mass numbers (8) 7. process which turns large alkane molecules into smaller alkane and alkene molecules (8) 8. has smaller molecules, weak attractive forces between them and is easily separated (6) Down 2. oil at the bottom of a fractional distillation column (7) 3. the changing of shape is called (10) 5. is the hardest natural substance known and has a very high melting and boiling point (8) 6. they are being used up faster than they are being formed (6, 5) 9. mixtures containing at least one metal (6) 10. the process makes a fixed amount and allows quanntities to be made that can be sold within a given time as many drugs have a 'sell by' date (5, 10)
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