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Chemistry Shapes of Molecules

When finding the shape and bond angle of a molecule, you find the number of electrons on the outer shell of the central atom. Then you see if there are any charges which you would take into account as you follow the rest of the steps. But for TlBr3(2-) you have 7 on the outer shell of TI and then you add 2 because of the charge giving you 9 outer shell electrons but this isn't possible since the maximum number in an electron shell is 8. The markscheme says the shape is trigonal pyramid and the bond angle is 107, how do you get this?
Reply 1
Avatar for humni
humni
Tl does not have 7 e's in its outer shell. It is in group 3
Reply 2
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Pebbles47
OP
7
Original post by humni
Tl does not have 7 e's in its outer shell. It is in group 3
thank you

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