In Brazillian portuguese, the only words ended with "n" are scientific names (neologisms?) with a latin radical, e.g. elétron, próton, nêutron, pólen, plâncton, necton, etc.
In European portuguese, while the above forms are also common, the alternatives "electrão, protão, neutrão" are often found.
In European portuguese, while the above forms are also common, the alternatives "electrão, protão, neutrão" are often found.