Single Choice

If $$X$$ and $$Y$$ are the second ionisation potentials of alkali and alkaline earth metals of same period, then :

A$$X > Y$$
Correct Answer
BX
CX=Y
DX<

Solution

The general electronic configuration of Alkali metal is $$ns^{1}$$ so if we remove first electron(first ionization energy) it will become octet configuration,so to remove next electron it requires more energy(second ionization energy) ,whereas the general electronic configuration of alkali earth metals is $$ns^{2}$$ so the electrons can be lost easily.,so the second ionization energy of alkali metal is more than the alkali earth metal,so the order of ionization energy is $$X > Y$$.
Hence option A is correct.

SIMILAR QUESTIONS

s - block Elements (Alkali and Alkaline Earth Metals)

The lightest metal among the following is:

s - block Elements (Alkali and Alkaline Earth Metals)

Size of hydrated ion of $$Li^+ and Be^{2+} $$ is :

s - block Elements (Alkali and Alkaline Earth Metals)

Compare the solubility and thermal stability of alkali metals carbonates with those of the alkaline earth metals nitrates.

s - block Elements (Alkali and Alkaline Earth Metals)

Which of the following oxides is most acidic in nature?

s - block Elements (Alkali and Alkaline Earth Metals)

The correct order of solubility of the following compound in water is:

s - block Elements (Alkali and Alkaline Earth Metals)

Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals. (a) Nitrates, (b) Carbonates, (c) Sulphates.

s - block Elements (Alkali and Alkaline Earth Metals)

The hydroxides and carbonates of sodium and potassium are easily soluble in water while the corresponding salts of magnesium and calcium are sparingly soluble in water. Explain?

s - block Elements (Alkali and Alkaline Earth Metals)

$$CaCl_2$$ is preferred over $$NaCl$$ for clearing ice on roads on particularly in very cold countries. This is because:

s - block Elements (Alkali and Alkaline Earth Metals)

Alkaline earth metals are better reducing agents than alkali metals.

s - block Elements (Alkali and Alkaline Earth Metals)

Which of the following groups of elements have chemical properties that are most similar :

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