Question

If electron goes from ground state to 1st excited state then change in energy of the hydrogen like ion is​

Answer 1

Answer:

984 kJ/mol = 1.635 × 10^-18 J/atom

Explanation:

The energy difference between two energy states can calculated by theformula

$change \: in \: energy \: = 1312.36( \frac{1}{ {a}^{2} } - \frac{1}{ {b}^{2} } )$

where "a" and "b" are the first and second shells respectively and the answer of this relation would be in kilo joules per mole of hydrogen.

Putting the values of "a" = 1 (ground state and "b" = 2 (first excited state)

it gives the first answer given above.

To find energy per atom we use the this relation

$change \: in \: energy \: = 2.18 \times {10}^{ - 18} ( \frac{1}{ {a}^{2} } - \frac{1}{ {b}^{2} } )$

this would give the answer in J/atom as given in the second answer above.