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Question
The metals of Group 2 from top to bottom are Be, Mg, Ca, Sr and Ba.
- Which one of these elements will form ions most readily and why?
- State the common feature in their electronic configuration.
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Solution
- Ba metal will form ions readily because the ionisation energy decreases down the group as the size increases.
- On moving down the group, the number of electrons in the outermost shell, i.e. valence electrons, remains the same. So, the valency in the group remains the same.
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