Question

What causes an atom to reach ionization energy and what does this mean for the atom?

Answer 1

ionisation energy is the energy required to remove the outermost electron of an atom
supposing i give some energy to atom,exciteing the electrons,electrons move to a higher energy level by absorbing energy
provided given the right amount of I.E the atom loses its outermost electron to become +vely charged

Answer 2

Ok, thank you :)