Chemistry Revision 3.0 / 5 based on 1 rating ? ChemistryGCSEAll boards Created by: Saleha.ACreated on: 15-05-13 14:38 what happens when you test hydrogen gas with a lighted splint? it burns with a squeaky pop 1 of 4 Hydrogen is made up of how many molecules joined together 2 2 of 4 What is the symbol for the element potassium K 3 of 4 What is an exothermic reaction? A reaction that gives out heat energy to the surroundings 4 of 4
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