is HeF7 stable?

Question

Would HeF7 be stable? Would there be any isomers possible? How could I find out bond angles?

I was trying to draw it but He only has 2 electrons on outer shell, and F has 7?

Answer 1

No. First, helium is a noble gas. Second, there are no readily accessible F orbitals in helium for expansion of the octet. This is not stable or feasible by any means.

I should add, as an interesting side note that xenon tetrafluoride was the first stable compound formed with a noble gas.

Answer 2

There are absolutely no compounds of He that are stable. Furthermore, He can only have 2 electrons in its outer level, and can't expand it at all.