Why the first ionization energy of sodium is less than that of magnesium?

Why the first ionization energy of sodium is less than that of magnesium?

Magnesium atom has a smaller radius and higher nuclear charge than a sodium atom, thus more energy will be required to remove the electron from the same orbital (3s), making the first ionisation energy of magnesium higher than that of sodium.

Why does the first ionization energy of sodium is less than that of magnesium but second ionization energy of sodium is higher?

1 Answer. The 1st ionization enthalpy of magnesium is higher than that of Na due to higher nuclear charge and slightly smaller atomic radius of Mg than Na.

Which has lowest ionization energy sodium or magnesium?

The first ionization enthalpy of sodium is lower than that of magnesium but its second ionisation enthalpy is higher than that of magnesium.

Why does sodium have a low first ionization energy?

The only factor left is the extra distance between the outer electron and the nucleus in sodium’s case. That lowers the ionization energy.

Why ionization energy of Na is more than Mg?

Hence, in case of sodium, the second electron has to be removed from the stable noble gas configuration. Consequently, removal of a second electron from sodium requires more energy in comparison to that required in magnesium. Therefore, the second ionization enthalpy of sodium is higher than that of magnesium.

Why second ionization energy of sodium is higher than magnesium?

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.

Why first ionisation energy of magnesium is higher than sodium but second ionisation energy of sodium is higher than magnesium?

For first ionization energy , as magnesium is smaller than sodium, more energy is need to remove first electron from magnesium. But when second electron is to be removed, sodium acquires stable noble gas configuration and thus more energy is required to remove the second electron.

Which has more ionization energy Na or Mg?

Magnesium (Mg) has a higher ionization energy than sodium (Na).

Why the first ionisation enthalpy of Mg is more than that of Na?

Solution : First ionization energy of Mg is more than that of Na because it has smaller atomic size but `2^(nd)` ionization of Mg is less because after losing one electron sodium acquires nearest noble gas configuration.

Why is the first ionization energy of sodium greater than magnesium?

The first ionization energy of magnesium is larger than sodium because magnesium has one more proton in its nucleus to hold on to the electrons in the 3s orbital.

Why first ionization energy of magnesium is higher than sodium but second ionization energy of sodium is higher than magnesium?

Why first ionization enthalpy of sodium is is less than magnesium while its second ionization enthalpy is higher than magnesium?

The first ionization enthalpy of sodium is lower than that of magnesium because the nuclear charge of Na (+11) is lower than that of Mg (+12) and size of Na is lower than Mg. After the loss of first electron, the electronic configuration of Na+ is 1s22s12p6 (has noble gas configuration) and Mg+ is 1s22s22p63s1.

Why is the second ionization energy of sodium higher than the first?

The explanation that the second energy of ionisation is greater than the first refers to the attraction between the nucleus and the electrons. When one tries to detach a second electron from a positive ion, owing to the added proton, there is further attraction between the electrons and the nucleus.

What is the first ionization energy of sodium?

496KJ/mol
For instance, the ionization energy of Sodium (alkali metal) is 496KJ/mol (1) whereas Chlorine’s first ionization energy is 1251.1 KJ/mol (2). Due to this difference in their ionization energy, when they chemically combine they make an ionic bond.

Why is the second ionization energy of sodium greater than magnesium?

Why second ionization energy of Na is higher than magnesium?

Why is the first ionization energy of Mg greater than that of both Na and Al taken separately?

The valence electron of aluminum is in 3p subshell which is farther than 3s electron from the nucleus. Therefore, it is easy to remove this electron. Due to this the first ionization energy of Al is less than Mg. In other words, the first ionization energy of Mg is greater than that of both Na and Al taken separately.

Why does magnesium have a higher ionization energy?

magnesium has a higher ionization energy because it outermost sub-energy level is full. they have the same ionization energy because they have the same number of valence electrons.

Why the second ionization energy of magnesium is higher than the first one?

The reason the second ionization energy is higher than the first relates to the attraction between the electrons and the nucleus. When one electron is removed from an atom, the neutral atom becomes positive.

Why the first ionization enthalpy of sodium is lower than that of magnesium while its second ionization enthalpy is higher than that of magnesium Na 11 Mg 12?