Chemistry 0.0 / 5 ? Chemistrykey termsGCSEOCR Created by: tialouise1234Created on: 25-03-16 11:28 31089421675 Across 1. A covalent bond made by the sharing of 2 pairs of electrons (6, 4) 5. Unsaturated hydrocarbon which contains a carbon-carbon double bond. Its general formula is CnH2n e.g Ethene (C2H4) (6) 6. An alkene with the formula C2H4 (6) 7. A substance made up of one type of atom (7) 10. A substance which helps keep immiscible liquids (e.g oil and water) mixed so they do not separate into layers (10) Down 2. Two or more atoms held together by covalent bonds (8) 3. A liquid, containing free moving ions, that is broken down by electricity in the process of electrolysis (11) 4. A mixture of metals (and sometimes non metals) e.g Brass= copper and zinc (5) 8. Hydrocarbons with similar boiling points operated from crude oil (8) 9. A substance that speeds up a chemical reaction but remains chemically unchanged itself at the end of the reaction (8)
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