Differences between Power Amplifier/ Number of Antenna Ports

Hi,

I don’t really know if someone already asked this question.

I would like to understand, what is the difference between Power Amplifier and Number of Antenna Ports?

and then:

Is there any different between Nb of antenna ports (from 1 to 128 with Massive MIMO) and physical antenna ports ?

Thanks a lot

Thank a lot for your response.