OCR AS Chemistry A Unit 1 retake - Friday

Group 2
Ionisation decreases; atoms become larger; increased sheilding outweighs increased nuclear charge; easier to lose electrons.

Group 7
Oxidising power decreases Cl < Br < I; atoms become larger and electronegativity decreases; increase nuclear charge outweighed my increase sheilding and increased atomic radius; halogens gain electrons; it is easier to gain electrons further up the group

If oxidising power decreases, surely its: Cl > Br > I ?


This is useful for G7: http://www.knockhardy.org.uk/assets/08GPVII.PDF

I've attached a powerpoint of unit 1 - if it's worked.

Hope it helps!

Thanks



...but 168 slides??!!

I've attached a powerpoint of unit 1 - if it's worked.

Hope it helps!

Do we need to know the history of the periodic table? I don't even remember learning this first time around...

I've attached a powerpoint of unit 1 - if it's worked.

Hope it helps!

Do we need to know the history of the periodic table? I don't even remember learning this first time around...

Same. Teachers were pretty ****. I didn't know half the stuff that i know now.

BTW- is it normal for the head of science to come into you're chemistry class, ask the teacher to, in a sense, 'go away', and then ask us questions on how they're doing they're job, *1 out of the 7 people passed, in January*

Ha yeah I had to pretty much learn everything myself, we have a good teacher once a week so we are ok for his topic!

Must've had some complaints! haha