Question

Explain Ionisation energy of Be is greater than that of Li?

Answer 1

Hey mate!☺
Here's your answer...!

What is Ionisation Energy?
↪The amount of energy required to remove an electron from a neutral isolated gaseous ion to convert it into a positively charged gaseous ion, is called Ionisation Energy.

↪Ionisation Energy tends to increase across a period from left to right because the atomic size decreases due to an increase in the nuclear charge, and thus more energy is required to remove the electron. Thus the Ionisation Energy of Be is greater than that of Li ‼

Hope this helps!❤