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Neon's ionization energy is 20.1397
Neon is a much smaller atom than selenium because neon has fewer occupied energy levels so it has a considerably smaller atomic radius. For that reason, it will be more difficult to remove an electron from Ne than Se, so Ne has the greater ionization energy.
Helium (He) has the highest ionization energy, then Neon (Ne) Ionization energy increases as you go across a period from left to right. Ionization energy decreases as you go down a group. Therefore, elements in the upper right of the periodic table have the highest ionization energy.
If you think to neon this energy is 2 080 kJ/mol.
Core electrons. Probably the 1s level would require the most ionization energy to pull these electrons.
Neon's ionization energy is 20.1397
Well, it would be Sodium because its in the energy level of 3, compared to Neon which is in the 2nd energy level.
The first ionization energy of neon is higher: 2 080,7 kJ/mol.
Cl
Neon is a much smaller atom than selenium because neon has fewer occupied energy levels so it has a considerably smaller atomic radius. For that reason, it will be more difficult to remove an electron from Ne than Se, so Ne has the greater ionization energy.
Because it just IS and due to fullfield electron configuration that make noble gas more stable. so neon has more ie.
Neon
Helium (He) has the highest ionization energy, then Neon (Ne) Ionization energy increases as you go across a period from left to right. Ionization energy decreases as you go down a group. Therefore, elements in the upper right of the periodic table have the highest ionization energy.
The first Ionization energy of fluorine is less than that of the helium and neon.
lithium
Neon. The closer electrons are to the nucleus, the greater the pull the nucleus has on the electrons.
because neon is a noble gas which has stable electronic configuration ,but this is not the same in case of fluorine.This means we have to give high energy to gaseous neon atom to ionise it.