c. When the effective nuclear charge felt by the valence electron is high.
Ionization energy is the energy required to remove an electron from an atom or ion. The effective nuclear charge is the net positive charge experienced by an electron in an atom, which is determined by the number of protons in the nucleus and the shielding effect of inner electrons. The higher the effective nuclear charge felt by the valence electron, the more tightly it is held by the nucleus, making it more difficult to remove and resulting in a higher ionization energy. Therefore, a low ionization energy would be associated with a low effective nuclear charge felt by the valence electron.
Which of the options explains low ionization energy?
a.
When the valence electron is at the zeroth order
b.
When the valence electrons are close to the nucleus
c.
When the effective nuclear charge felt by the valence electron is high
d.
When the effective nuclear charge felt by the valence electrons is low
1 answer
1 answer