In which of the following pairs, the first member has higher first ionization energy ?

Which element has highest first ionization energy?

Which element has highest first ionization energy?

Which element has the highest first ionization energy?

Which element in each of the following pairs would you expect to have higher first ionisation energy and why? H ,He

Which element in each of the following pairs would you expect to have higher first ionisation energy and why? F ,Cl

Which element in each of the following pairs would you expect to have higher first ionisation energy and why? N, O

Which of the following represents the correct order of first ionization energies ?

What is meant by first ionization energy ?

Which of the following elements has the highest first ionization potential?