chemisrty 5.0 / 5 based on 1 rating ? ScienceChemistryGCSEAQA Created by: jordanbunneyCreated on: 28-01-14 11:19 75231846 Across 1. The centre part of an atom is called the (7) 4. Which gas mostly makes up the earth atmosphere (8) 5. If something turs the universal indicator paper red it is a (6, 4) 6. Crude oil is a mixture of compounds called (12) Down 2. Covalent bonding is between (3, 3, 6) 3. What is the substance called that is being broken down (11) 7. During electrolysis the negative ions go to which electrode (8, 9) 8. What is the centre of the earth called (5, 4)
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