15:0815:08, 3 August 2015diffhist−26
Boric acid
removed the strong base- greenwood descibes it as strong acid, The pount is debatable however and obviously confusing
12:4712:47, 14 April 2015diffhist+2
Molecular geometry
there is no ideal VSEPR structure for trigonal pyramidal- the only prediction that VSEPR makes is that teh angle is less than 109.5 due to lp-bp repulsion
17:3917:39, 11 March 2015diffhist+2,216
Double bond
Added a para on group 14 double bonds and modified some of the generalisations concerning double bonds - carbon and the first row are the exception.