5. The ionisation energy of H atom is 13.6 eV. What will be ionisation

1.	5. The ionisation energy of H atom is 13.6 eV. What will be ionisation encrgy ofHe and Li' ions?
Answer» To find the ionisation energy of a hydrogen like atom with one electron we use the formula IE =13.6Z²/n²eV Where Z is atomic number and n is the shell number. In this case Z is 2 and 3 and n is 1( because hydrogen is having n=1) so IE He+ = 13.6*(2)² = 54.4 eV.So IE Li²+ = 13.6×9 = 122.4 eV. pls answer next one also

5. The ionisation energy of H atom is 13.6 eV. What will be ionisation encrgy ofHe and Li' ions?

Answer»

To find the ionisation energy of a hydrogen like atom with one electron we use the formula

IE =13.6Z²/n²eV

Where Z is atomic number and n is the shell number.

In this case Z is 2 and 3 and n is 1( because hydrogen is having n=1)

so IE He+ = 13.6*(2)² = 54.4 eV.So IE Li²+ = 13.6×9 = 122.4 eV.

pls answer next one also