Chemistry Mid-term Revision 0.0 / 5 ? ChemistryChemistry Mid term revision flashcardsIGCSECIE Created by: _nana.aCreated on: 19-05-17 17:12 What is the most reactive element that can be used to clean the mouth? Flourine (F) 1 of 7 Why does chlorine have the atomic mass 35.5? Chlorine has two isotopes which, when the average is found, adds up to 35.5 2 of 7 Who created the periodic table? Dimitri Mendeleev 3 of 7 Describe the brownian motion. Smaller particles bombard against larger particles causing them to move in all directons. 4 of 7 Give two examples of the Brownian Motion. a) Pollen grains in water b) Smoke paticles in air 5 of 7 What is an acid? An acid is a proton donor. It donates Hydroxide (OH-) ions when is dissociates in water 6 of 7 Give the formula for sulphuric acid. H2SO4 7 of 7
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