C1 0.0 / 5 ? ChemistryNanoscienceCrude oil, cracking and hydrocarbonsMetals, metal ores and alloysGCSEOCR Created by: beckymorris51Created on: 07-12-15 10:11 81035472916 Across 1. oil at the bottom of a fractional distillation column (7) 5. elements that have atoms of the same atomic number but different mass numbers (8) 6. mixtures containing at least one metal (6) 7. has smaller molecules, weak attractive forces between them and is easily separated (6) Down 2. form negative ions as they gain electrons (3, 6) 3. the changing of shape is called (10) 4. process which turns large alkane molecules into smaller alkane and alkene molecules (8) 8. they are being used up faster than they are being formed (6, 5) 9. is the hardest natural substance known and has a very high melting and boiling point (8) 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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