F321 26th may 2017

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The paper was okay, I'm sure they will make the grade boundaries high !!! The polar thing I kept tick ✅ X X ✅ I kept the ones whiteout lone pairs as non polar

Reply 41

tavleen123

Original post by Tanishalaura

I think sicl4 and bcl3 are not polar because they are symmetrical so the dipoles cancel put?

Yea I got that and the other 2 were polar

Reply 42

ammaarah01x

Original post by Tanishalaura

I got something like 1440cm^3 and 7 as x

Yep got 7

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Reply 43

Sunny775

Original post by ammaarah01

Yep got 7

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Anybody managed to get a hold of an unofficial mark scheme?

Reply 44

Miminfl

Can we write mg2+instead of mg when talking about the question about why mg has higher melting point than Na ???

Reply 45

ammaarah01x

Original post by Miminfl

Can we write mg2+instead of mg when talking about the question about why mg has higher melting point than Na ???

That should be alright cuz nuclear charge is one of the points

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Reply 46

Miminfl

Original post by ammaarah01

That should be alright cuz nuclear charge is one of the points

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I mentioned that mg2+ also has more electrons than na+ And is mg2+ is smaller than na+ but can't remember if I said about metallic bonding that mg2+ has stronger metallic bonds