The first ionization potential of alkaline earth metal is greater than alkali metals because?
Correct answer: C. They have smaller atomic sizes.
- A. They are more reactive.
- B. They have greater atomic radii.
- C. They have smaller atomic sizes.
- D. All
Explanation
Correct option is C. Alkaline earth metals have smaller atomic sizes as compared to alkali metals so electrons of outermost shells of alkaline earth metals are held tightly. As the nuclear charge increases it requires more energy to remove electrons(Ionization energy) hence ionization energy will be increased. The first ionization energies of alkaline earth metals are higher than those of the alkali metals. This is because of the increase in the nuclear charge of the alkaline earth metal.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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