chemistry C3 cross word 0.0 / 5 ? ChemistryC3GCSEOCR Created by: liv.livCreated on: 26-05-22 20:31 what tells us no atoms can be created or destroyed?(3words) conservation of mass 1 of 20 what type of reaction gives out energy? exothermic 2 of 20 what type of reaction gives in energy? endothermic 3 of 20 what type of energy is needed to begin a reaction? activation 4 of 20 a substance with a pH over 7 is a ... base 5 of 20 a substance with a pH under 7 is an … acid 6 of 20 a base dissolved in water is called an ... alkali 7 of 20 when an acid and a base react a salt and what is produced? water 8 of 20 when an acid and metal react a salt and what is produced? hydrogen 9 of 20 oxidation is what of electrons loss 10 of 20 reductions is what of electrons gain 11 of 20 a reaction with both a oxidation and a reduction is called a ... reaction redox 12 of 20 cations are positive 13 of 20 anions are negative 14 of 20 cathode is negative 15 of 20 anode is positive 16 of 20 you can test for carbon dioxide with what? limewater 17 of 20 you can test for hydrogen with a? squeaky pop 18 of 20 you can test for oxygen with a? relit splint 19 of 20 you can test for chlorine with? blue litmus paper 20 of 20
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