[artem.metelskiy]

I'm asked to draw a Lewis dot structure for PF₅Br^-, but I'm not sure which element goes into center. I'm guessing it will be Br having 4 bonding pairs with F, one bonding pair with P and one lone pair. Is it correct?
I'm also asked to name molecular shape and Hybridization of central element. Would it  be square pyramidal shape and hybridization sp³d³? Thanks.

[JustinCh3m]

generally speaking, the halogens F and Br will behave like H in Lewis structures -- they usually are attached to just one other atom.  There are exceptions of course (i.e I3-), but go with this. 

So, try arranging the 6 halogens accordingly.  What do you get?...

[artem.metelskiy]

so the Lewis dot structure would look like this?

Molecular shape Octahedral and hybridization sp³d²?

[rabolisk]

Yes, I believe so.