The mass of the antileptons is identical to that of the leptons, but all of the other properties are reversed. A third characteristic feature of leptons, in addition to their charge and mass properties, is their intrinsic angular momentum, or spin. Leptons are classified within a larger group of subatomic particles, the fermions, which are characterized by half-integer values of their spin.
Trick and Treat: Halloween in Italy. 28th October 2015. Itâs nearly that spooky time of year again. Although Halloween is renowned around the world as a holiday loved by the Americans (their holidays are celebrated bigger and better than anywhere else) it is becoming more and more popular in Italy.
April 25th is another major holiday on the Italian calendar â itâs Liberation Day, and there are often parades and demonstrations in cities and towns throughout the country. On the other end of the seriousness spectrum, April Foolâs Day in Italy may not be as big of a deal as it can be in some other countries, but itâs definitely recognized by some.