You Do Need power plug adapter while traveling from Argentina to Bahamas.

Here is Why You Need An Adapter

The outlet and plug type used in Bahamas are A and B and in Argentina are C and I. This is how they look like.

Argentina

In Argentina, outlets of type C and I are in use.

Type C

Type I

Bahamas

In Bahamas, outlets of type A and B are in use.

Type A

Type B