The energy required to remove the valence electrons of an isolated gaseous atom is called ionization energy.
The energy required to remove an electron from an isolated gaseous atom is called __ energy.
The energy required to remove an electron from an isolated gaseous atom is called __.
Fill in the blanks from the choices given in brackets.
The energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively charged gaseous ion is called ______ (electron affinity, ionization potential, electronegativity).