Question

what is ionization energy?
ionization energy is the energy required to remove an electron from a specific atom. it is measured in kj/mol, which is an energy unit, much like calories. the ionization energies associated with some elements are listed on table s. for any given atom, the outermost valence electrons will have lower ionization energies than the inner - shell kernel electrons. as more electrons are added to a nucleus, the outer electrons become shielded from the nucleus by the inner shell electrons. this is called electron shielding.
define ionization energy in your own words.

Explanation:

Ionization energy refers to the amount of energy that needs to be supplied to an atom to remove one of its electrons. This energy is typically measured in kJ/mol. The outermost (valence) electrons of an atom generally require less energy to be removed compared to the inner - shell (kernel) electrons. Also, when more electrons are present in an atom, the outer electrons are shielded from the nucleus's positive charge by the inner - shell electrons, which affects the ionization energy.

Answer:

Ionization energy is the energy needed to remove an electron from an atom, measured in kJ/mol, with outer - shell electrons generally requiring less energy to remove than inner - shell ones, and outer electrons being shielded by inner electrons in multi - electron atoms.