Question

Calculate the energy (in kJ/mol) required to remove the electron in the ground state for each of the following one-electron species using the Bohr model.
(a) He+


kJ/mol

(b) Li2+
kJ/mol

Answer 1

For He^+,
E = 2.180E-18 J*Z^2(1/n²)
Z is the atomic number of He. n is the principal quantum number of the for the one remaining electron. This will give you J per photon. You need to multiply by 6.02E23 for J/mol then convert to kJ/mol.

Answer 2

testing