Which of the following alkaline earth metals | vedclass

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(D) Beryllium $(Be)$ is the first member of the alkaline earth metals group $(Group \ 2)$.It shows anomalous behavior due to its small atomic size and

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$Be$

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(D) Beryllium $(Be)$ is the first member of the alkaline earth metals group $(Group \ 2)$.It shows anomalous behavior due to its small atomic size and high polarizing power.It exhibits a diagonal relationship with aluminum $(Al)$.Both $Be$ and $Al$ have similar electronegativity values ($Be \approx 1.57$,$Al \approx 1.61$) and similar charge-to-size ratios,which leads to similarities in their chemical properties.

Which of the following alkaline earth metals shows anomalous behavior and has an electronegativity similar to that of aluminum?

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