Hey everyone! it's been some time since I last blogged here. Good to see the class back together again.


actually, I'm rather relieved to have my foot intact--just joking XD


Anyway, there's a strings concert on the 29th of May..... anyone wants to come support us? Its at 7.30 at VCH(Victoria Concert Hall)... and tickets are $10 only. Name is Inspirations '07: Last Round. We'll be playing Tchaikovsky's Serenade for Strings, our two SYF pieces, one of them being Golijov's Last Round itself, and more!


Any other musical group having performances, let me know. I'll be happy to come and buy your tickets too.


OK this post is starting to sound more like a morning announcement instead.


A few facts we learnt during Chem lectures. Only one set of notes was given for one set of lectures by the same lecturer... so I imagine it becomes our HOLY grail?=p


-Dot and cross diagrams
Firstly you determine the groups of the atoms, then you arrange them around the central atom(s) and draw in the corresponding number of electrons. Personally, I prefer to save my dots and crosses for tic-tac-toe.


-Dative bonding
Basically, dative bonding involves the transfer of a loaned *cough* sry, LONE pair of electrons from one atom to another.


-Electronegativity
Fluorine is an evil element. It bonds other atoms by stripping away their electrons.


-Sigma and Pi bonds
When covalent bonds(non-dative) are formed between two atoms, a sigma bond is formed first through head-on overlapping of orbitals, and all subsequent bonds(making the bond a double or triple bond) are pi bonds, involving side-on overlapping. It makes sense I suppose. Finish your Maths tutorial 1D first before eating pastry.


Hope all that helped your revision some. =P enjoy your holidays everyone!