If a hydrogen atom has 2 neutrons is it an isotope?

YES!!!

Hydrogen has three isotopes . they are

Protium ; 1 proton, o neutrons , 1 electron

Deuterium ; 1 proton , 1 neutron , 1 electron

Tritium ; 1 proton ; 2 neutrons , 1 electron This is the answer to your question. However, it is very rare and radio-active. Sometimes named as 'super heavy hydrogen'.

Notice in each case , it is only the number of neutrons that alters.