1.

As an electron makes a transition from an excited State to the ground state of a hydrogen - like atom/ion :

Answer»

Its KINETIC energy increases but potential enegy and TOTAL energy decrease
kinetic energy potential energy and total energy decreases
kinetic energy decreases, potential energy increases but total energy REMAINS same
kinetic energy and total energy decreases but potential energy increases

Solution :`KE ALPHA (Z/n)^(2)`
as n decreases KE increases and TE, PE decreases.


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