Answer: Group 2: alkaline earth metals.
Which group has the lowest ionization energy?
The group of elements which have the lowest ionization energy are the alkali metals.
Which group has the largest second ionization energy?
When Na+ ions loses an electron, this stable configuration of Ne is broken. This requires high amount of energy. Hence, second ionization energy of sodium is largest.
Which has the highest second ionization?
Thus, second ionization energy of sodium is extremely high.
What has the highest ionization energy?
The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.
Why does Group 1 have the lowest ionization energy?
Going down the group, the first ionisation energy decreases. There is more shielding between the nucleus and the outer electrons and the distance between the nucleus and the outer electron increases and therefore the force of attraction between the nucleus and outer most electrons is reduced.
How does second ionization energy compare?
An element’s second ionization energy is the energy required to remove the outermost, or least bound, electron from a 1+ ion of the element. Because positive charge binds electrons more strongly, the second ionization energy of an element is always higher than the first.
What is the trend for second ionization energy?
The second ionization energy of an element will be higher than the first ionization energy. General trends in the ionization energy of elements in the Periodic Table: ⚛ Ionisation energy decreases down a group. ⚛ Ionisation energy increases across a period from left to right.
Which has a higher second ionization energy Na or MG?
So after it losing its one electron it becomes more stable by attaining noble gas configuration and hence more enthalpy is required to remove an electron from the stable atom hence the second ionisation enthalpy of sodium is greater than that of Magnesium.
Which element in period 3 has the highest second ionization energy?
Sodium has highest second IP because after losing one electron it achieves the configuration of stable noble gas Neon. Sodium has highest second ionization energy than mg..
Why does sodium have the highest second ionisation energy?
Answer. The reason the second ionization energy is higher than the first relates to the attraction between the electrons and the nucleus. When one attempts to remove a second electron from a positive ion, there is more attraction between the electrons and the nucleus due to the extra proton.
Which element has the third highest ionization energy?
On the basis of its electronic structure, clearly magnesium metal will have the highest third ionization energy.
Why are there exceptions to ionization energy?
Exceptions to the Ionization Energy Trend
The first ionization energy of boron is less than that of beryllium and the first ionization energy of oxygen is less than that of nitrogen. The reason for the discrepancy is due to the electron configuration of these elements and Hund’s rule.
What has the largest atomic radius?
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
How is ionization energy determined?
The ionization energy of a chemical element, expressed in joules or electron volts, is usually measured in an electric discharge tube in which a fast-moving electron generated by an electric current collides with a gaseous atom of the element, causing it to eject one of its electrons.