. Every pion contains a quark and an antiquark which is for that reason a meson. Pions would be the lightest mesons and, far more usually, the lightest hadrons. They can be unstable, With all the billed pionsফেইসবà§à¦• পেইজ à¦à¦¿à¦œà¦¿à¦Ÿ ও লাইক à�… Read More