the periodic table 0.0 / 5 ? SciencePeriodic tableGCSECCEA Created by: BobbycarCreated on: 03-10-19 09:59 In the 1800s, how were the elements ordered and why? atomic mass, as protons, neutrons and electrons had not been discovered 1 of 11 How did Newlands order his periodic table? he used the Law of Octaves 2 of 11 What was wrong with Newlands' table? he ended up having non-metals with metals 3 of 11 what did Mendeleev do to his table? (2 marks) he left gaps, he swapped elements around 4 of 11 how many elements now exist? a) 50 b) 100 or c) 1000 b) 100 5 of 11 what do groups have that are the same? the same number of outer electrons 6 of 11 how many electrons does beryllium, Be, have in its outer shell? use a periodic table to help. two 7 of 11 chlorine reacts in a similar way to bromine. suggest a reason why. they are both in the same group. 8 of 11 why do group 1 metals have similar properties? they all have 1 outer electron 9 of 11 write a word equation for the reaction between potassium and water potassium + water potassium hydroxide and water 10 of 11 why can bromine displace iodine from a solution of sodium iodide? it is more reactive. 11 of 11
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