What is the unit of ionisation energy?

What is the unit of ionisation potential?

Why is the third ionisation energy of manganese exceptionally high ?

What is the unit of energy ?

With increasing screening effect the value of ionisation energy

What do you mean by ionisation energy? What type of change is obersed down a group and accross a period in periodic table?

Which of the following has highest first ionisation energy?

Which one of the following has the lowest ionisation energy?

Which of the atoms having following electronic configuration will have the highest first ionisation energy?

Among the following which has the maximum ionisation energy