As the size of an atom increases, the energy needed to remove an electron decreases.
As the size of an atom increases, the atomic radius increases: the distance between the nucleus and the outer electron shell becomes greater. This means that the positive nuclear charge has less of an effect on the negatively charged electron, so the attractive force between the nucleus and the electron is weaker. Less energy is required to overcome the weaker force.
It's rather the other way round. The more electrons and protons (and neutrons) there are, the heavier the atom.
Ionization energy
How much energy is required to move the electron of the hydrogen atom from the 1s to the 2s orbital
Since work function is the energy needed to dislodge the electron, I'd say that the unit is Joules or eV (electron Volts).
magnesium has a 2 valence electrons. because the third electron is not a valence electron, or in the outer shell, much more energy would be needed to remove it
Briefly, it is the energy required to completely remove a valence (outer shell) electron from its atom when forming an ionic bond.See related links below for more info
There is an attraction of the nucleus for electrons. This attractive force must be overcome to remove an electron. The energy to overcome this attraction and remove an electron from the atom is 'ionization energy'.
The energy needed to remove an electron from an atom (in the gaseous state) is called the IONIZATION ENERGY.
The amount of energy needed to remove the outermost electron.
Ionization energy
The energy needed to remove an electron from an atom generally increases, decrease as you go across a period? Explain why ? please
How much energy is required to move the electron of the hydrogen atom from the 1s to the 2s orbital
First ionization energy is the energy required to remove the first outermost electron from an atom. The second ionization energy is the energy required to remove the next available electron, and is greater than the first IE. The third IE is that energy needed to remove the third electron, and is greater the the second IE.
Since work function is the energy needed to dislodge the electron, I'd say that the unit is Joules or eV (electron Volts).
The energy required to remove an electron~ Apex! :D
the nucleous is positively charged , the electron is negatively charged..the closer to the nucleous an electron is the strongest is the force that attracts it (the force of the nucleous) so more energy is needed to remove it
magnesium has a 2 valence electrons. because the third electron is not a valence electron, or in the outer shell, much more energy would be needed to remove it
First ionization energy is the energy required to remove the first outermost electron from an atom. The second ionization energy is the energy required to remove the next available electron, and is greater than the first IE. The third IE is that energy needed to remove the third electron, and is greater the the second IE.