Question

Explain why the first ionisation energy of helium is
larger than that of hydrogen.​

Answer 1

Step-by-step explanation:

• helium has a structure 1s² the electrons are removed from the same orbital as in case of hydrogen the electrons are closest to the nucleus the value of ionization energy of helium is much higher than hydrogen because the nucleus now has 2 proton attracting the electrons instead of 1 in case of hydrogen