Estimate the difference in energy between 1st and 2nd Bohr orbits for hydrogen atom. At what minimum atomic number, a transition from n = 2 to n=1 energy level would result in the emission of X-rays with `lambda=3 xx 10^(-8) m? ` Which hydrogen atom like species does this atomic number correspond to?

Answer

2

Explanation

`13.6Z^(2)((1)/(1)-(1)/(4))eV=(hc)/(lambda)" "rArr" "13.6xx1.6xx10^(-19)Z^(2)xx(3)/(4)=(6.626xx10^(-34)xx3xx10^(8))/(3xx10^(-8))`
`rArr" "Z^(2)=4 rArr Z=2`