1.

If an elementemitsphotonin its groundstatedue toelectron transition , thenits .

Answer»

atomicnumberwill increase
ATOMICNUMBER will remainsunchaged
atomicnumberwill decrease
MASS numberwill decrease

Solution :In the ground state electronictransition will occur only when an electron from K-shell i.e., FIRSTSHELL is captured by the nucleus (K - electron capture).Electron so capturedconverts proton into neutron resultingin the decrease of atomic NUMBER.


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