Chemistry 2 4.0 / 5 based on 1 rating ? ChemistryGCSEAQA Created by: Emily SeagerCreated on: 04-01-13 11:34 what is a endothermic reaction? Endothermic reactions take in energy from the surroundings. 1 of 7 What is a exothermic reaction? Exothermic reactions release energy to the surroundings 2 of 7 Which sort of elements form covalent bonds? Non-metals form covalent bonds 3 of 7 What does a covalent bond involve? A covalent bond involves sharing electrons between atoms 4 of 7 What is the mass number of an atom? The mass number of an atom is the number of neutrons and protons in the atom. 5 of 7 Why does reaction rate increase as the concentration increases? There are more particles so there are more collisions 6 of 7 What happens during electrolysis? During electrolysis gases may be given off or metals deposited at the electrodes. 7 of 7
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