A gas of identical hydrogen-like atoms has some atoms in the lowest (ground) energy level A and some atoms in a particular upper (excited) energy level B and there are no atoms in any other energy level. A muon is an unstable elementary particle whose mass is 20 me and whose charge is either +e or -e. A negative muon can be captured by a nucleus to form a muonic atom. Suppose a proton September 11, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related