How to know properties of ion Aluminum -27?
Aluminum-27 refers to an isotope of aluminum. For almost all chemical reactions the isotope makes no difference in the chemistry. You need "exotic" (meaning very unusual) conditions for the isotope to matter. 

Unusual conditions would mostly happen in the gas state. For example a lighter gas would diffuse faster. This was the basis for the separation of uranium isotopes at Oak Ridge during WWII to make the first atomic bomb.