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Helium has 2 electrons in the 1s orbital, meaning that these electrons are as close to the nucleus as possible. The nucleus has a positive charge, pulling these negative electrons very tightly. It takes a lot of energy to break this attraction. Having 2 electrons in the 1s orbital also means that it is very stable. Other elements with full outer shells or with electrons in other orbitals having a smaller first ionisation energy than Helium. This is because the electrons in previous orbitals shield the valence (outer) electrons, so the charge of the nucleus isn't felt as much, and is therefore easier to break the attraction.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoHelium has 2 electrons in the 1s orbital, meaning that these electrons are as close to the nucleus as possible. The nucleus has a positive charge, pulling these negative electrons very tightly. It takes a lot of energy to break this attraction. Having 2 electrons in the 1s orbital also means that it is very stable. Other elements with full outer shells or with electrons in other orbitals having a smaller first ionisation energy than Helium. This is because the electrons in previous orbitals shield the valence (outer) electrons, so the charge of the nucleus isn't felt as much, and is therefore easier to break the attraction.
Wiki User
∙ 12y agoHe = 1s2, so all its electrons are in the 1s orbital. This means they are all very close to the positively charged nucleus and will be highly attracted to it. This also means that there isn't any shielding from other orbitals, so it willtake a huge amount of energy to pull an electron from it
Hope this helps :) r
Wiki User
∙ 11y agoHelium has 2 electrons in the 1s orbital, meaning that these electrons are as close to the nucleus as possible. The nucleus has a positive charge, pulling these negative electrons very tightly. It takes a lot of energy to break this attraction. Having 2 electrons in the 1s orbital also means that it is very stable. Other elements with full outer shells or with electrons in other orbitals having a smaller first ionisation energy than Helium. This is because the electrons in previous orbitals shield the valence (outer) electrons, so the charge of the nucleus isn't felt as much, and is therefore easier to break the attraction.
Wiki User
∙ 10y agoHelium has a structure of 1s2 therefore has a completely filled outermost shell making it very stable. the electron that needs to be remove is very close to the nucleus and does not feel any shielding effect. there are also 2 protons attracting the negative electrons. this makes helium has the largest ionisation energy of all the atoms.
Wiki User
∙ 11y agoHelium has completely filled valence electrons and has stable electronic configuration. So it will not lose electrons and will have high ionisation energy.
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Ionisation energy of noble gases?
noble gases have the maximum ionisation energy. helium has the highest ionisation energy
Name the elements with highest ionisation enthalpy?
Helium
What is the ionic charge of Helium?
it would have to lose an electron to become an ion as it allredy has a full outershell, for every electron lost the He will gain a charge of +1, but this would be very difficult to obtain as its ionisation energy is very high, in the periodic table ionisation enerygy goes up as you go across the period (from left to right the amount of nuclear charge increases) and it also goes up as you go up a group (as you go up a group the amount of inner sheilding ans distance between outer electron and nucleus decreses, increasing nuclear charge and decreasing shielding and distance all increase ionisation energy) and He is right in the top right corner, Helium has the highest first ionisation energy (ionisation energy is the amount of energy needed to remove one electron from each atom in 1 mole of an element in an gaseous state). the charge of its ion will completely depend on how many electrons it has lost.
What element has the Highest ionization energy in Group 14?
ionisation energy order for gr 14 is c>si>ge>sn<pb
What element has the largest ionization energy?
Helium has the highest ionization energy.
Ionisation energy of noble gases?
noble gases have the maximum ionisation energy. helium has the highest ionisation energy
Name the elements with highest ionisation enthalpy?
Helium
Which elements has the highest ionisation energy?
Helium has the greatest ionization energy. Its electron is being removed from the principal shell closest to the nucleus. It has a greater I.E. than hydrogen does because the electron is being pulled away from a greater nuclear charge.
Why be has heigher ionization enthalipy than b?
Helium has the highest ionisation energy of all the elements. It takes 23779kJ to remove only one electron from 1 mol or 4.003g of helium. Trying to ionise 1 gram or 6.193L of Helium is the same as boiling around 75 850L of water Helium has a very high ionisation energy because its atomic radius is very small which causes the force of attractiion between the nucleus and the electrons to be very strong.
Which element has got the highest ionisation potential in the periodic table?
Nitrogen has the highest first Ionization potential.
Why does helium has a higher first ionization energy than argon?
The ionisation energy depends on the orbital from which the electron is removed and also the distance of the orbital from the nucleus. In the case of Helium, the electron is removed from 1s orbital whereas in the case of argon it is from 3p orbital. As 1s is closer to the nucleus, the force of attraction experience by these electrons is higher and hence helium will have higher 1st ionisation energy.
What has the largest ionization energy?
Helium has the highest ionization energy.
Elements that have the highest first ionization energy?
Helium (He) has the highest first ionization energy. Ionization energy increase as you go across the periodic table from left to right
Which Lewis structure represent an atom x in period 4 with the highest first ionisation energy?
. .x ..
Has the highest ionization energy in the group element?
ionisation energy order for gr 14 is c>si>ge>sn<pb
What is the ionic charge of Helium?
it would have to lose an electron to become an ion as it allredy has a full outershell, for every electron lost the He will gain a charge of +1, but this would be very difficult to obtain as its ionisation energy is very high, in the periodic table ionisation enerygy goes up as you go across the period (from left to right the amount of nuclear charge increases) and it also goes up as you go up a group (as you go up a group the amount of inner sheilding ans distance between outer electron and nucleus decreses, increasing nuclear charge and decreasing shielding and distance all increase ionisation energy) and He is right in the top right corner, Helium has the highest first ionisation energy (ionisation energy is the amount of energy needed to remove one electron from each atom in 1 mole of an element in an gaseous state). the charge of its ion will completely depend on how many electrons it has lost.
Which elements on periodic table have the highest ionization energies?
Helium (He) has the highest ionization energy.
