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Choose the correct order of increase in electropositivity of alkali earth metals in the options given below

  • a)
    Be2+<Mg2+<Ca2+<Sr2+<Ba2+

  • b)
    Sr2+ > Ba2+ < Be2+ < Mg2+ < Sr2+

  • c)
    Ca2+ > Sr2+ > Ba2+ < Be2+ < Mg2+

  • d)
    Mg2+ > Ca2+ > Sr2+> Ba2+ < Be2+

Correct answer is option 'A'. Can you explain this answer?

Answers

Correct Answer : a
Explanation : Atomic no. of Be, Mg, Ca, Sr, Ba are 4, 12,20,38,56 respectively.
On moving down the group, the effective nuclear charge on the outermost electrons decreases. Hence Ba can readily lose electrons and will be the most electropositive element among the alkaline earth metals.

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Choose the correct order of increase in electropositivity of alkali earth metals in the options given belowa)Be2+<Mg2+<Ca2+<Sr2+<Ba2+b)Sr2+ >Ba2+ <Be2+ <Mg2+ <Sr2+c)Ca2+ >Sr2+ >Ba2+ <Be2+ <Mg2+d)Mg2+ >Ca2+ >Sr2+>Ba2+ <Be2+Correct answer is option 'A'. Can you explain this answer?
answer is wrong,elecropostivity increases down the group as e- losing tendency incrases due to decrase in vander vall forces down the group

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Going down the group electropositivity increases. as the tendancy of losing electon increases

Choose the correct order of increase in electropositivity of alkali earth metals in the options given belowa)Be2+<Mg2+<Ca2+<Sr2+<Ba2+b)Sr2+ >Ba2+ <Be2+ <Mg2+ <Sr2+c)Ca2+ >Sr2+ >Ba2+ <Be2+ <Mg2+d)Mg2+ >Ca2+ >Sr2+>Ba2+ <Be2+Correct answer is option 'A'. Can you explain this answer?
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Correct Answer : aExplanation : Atomic no. of Be, Mg, Ca, Sr, Ba are 4, 12,20,38,56 respectively.On moving down the group, the effective nuclear charge on the outermost electrons decreases. Hence Ba can readily lose electrons and will be the most electropositive element among the alkaline earth metals.