Question

1. which alkali metal would have the largest atomic radius?

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1. which alkaline earth metal would have the smallest atomic radius?

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Explanation:

1. For alkali metals (Group 1 elements), atomic radius increases down the group due to the addition of electron - shells. Francium (Fr) is the bottom - most alkali metal, so it has the largest atomic radius.
2. For alkaline earth metals (Group 2 elements), atomic radius decreases up the group as the effective nuclear charge increases and the number of electron - shells decreases. Beryllium (Be) is the top - most alkaline earth metal, so it has the smallest atomic radius.

Answer:

1. Francium (Fr)
2. Beryllium (Be)