shapes of molecules 4.0 / 5 based on 6 ratings ? ChemistryBonding & shapesASEdexcel Created by: danni :)Created on: 28-05-13 19:14 molecular shapes depends on the number of pairs of electrons in the outer shell of a central atom 1 of 7 electron pairs are negatively charged so will repel each other 2 of 7 put these bond angles in order of increasing size bond pair- bond pair, bond pair- lone pair, lone pair- lone pair 3 of 7 tetrahedral molecules, with no lone pairs, have a bond angle of 109.5 4 of 7 Boron trichloride, BCl3, is planar with a bond angle of 120° 5 of 7 The HNH bond angle in ammonia is 107° 6 of 7 The shape of an ammonia molecule is: pyramidal with four electron pairs around the nitrogen atom 7 of 7
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