Yes. If the units are eV (electron volts) this is called ionization potential,

if the units are kJ/mol then this ionization energy.

The conversion between the units is:-

96.485 kJ/mol = 1 eV/particle)

Historically it was always called ionization potential as that reflected the method of measurement.

The ionization potential of helium in the 2nd ionization state is higher than the 1st ionization potential. For helium, the 2nd ionization potential is about 54.4 eV. This means that it requires at least 54.4 electron volts of energy to remove the second electron from a helium atom.

Helium has the highest ionization potential in the periodic table due to its stable electron configuration with a full valence shell of electrons. This makes it difficult to remove an electron from a helium atom, resulting in a high ionization energy.

Ionization Potential

Ionization potential is the energy required to remove one electron from an atom in the gaseous state. The units may be eV(electron volts) or kJ/mol. These are readily interconverted.

Usually the ionization potentials for successive electrons are quoted as the first ionization potential, second ionization potential etc.