An electron in an unielectronic species A^+x is represent in nth Orbit .The Separation energy of that electronic from nth Orbit is 7.65 EV the frequency of photon required to excite electron from nth orbit to (n+2 ) orbit is 1.025 ×10^15 Hz. mark the correct statement.1.the value of n+1 is 4
2.element A is beryllium
3. value of x is 2
4.kinetic energy of electron in (n+2) orbit is 1.51 eV
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