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Bond strength

WHY is the C-Br bond weaker than the C-Cl bond?
Thanks
Reply 1
Avatar for Blob2491
Blob2491
12
Think about the radius of the halides down a group
Reply 2
Avatar for krisshP
krisshP
OP
14
Original post by Blob2491
Think about the radius of the halides down a group


I think the radius increases down the group. How does this have an effect of making the bond weaker?
Original post by krisshP
I think the radius increases down the group. How does this have an effect of making the bond weaker?


longer bond = weaker bond
Reply 4
Avatar for vxrz
vxrz
7
If the radius increases, the valence electrons will be further from the nucleus, thus decreasing the nuclear attraction between the nucleus and the valence electrons. Weaker attraction means less energy required to break a bond.

Sent from my GT-N7000
Reply 5
Avatar for krisshP
krisshP
OP
14
Original post by charco
longer bond = weaker bond



Original post by vxrz
If the radius increases, the valence electrons will be further from the nucleus, thus decreasing the nuclear attraction between the nucleus and the valence electrons. Weaker attraction means less energy required to break a bond.

Sent from my GT-N7000


I understand, so thanks :biggrin:

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