Question

ans correctly. i will mark u as brainlist. ans both the question​

Answer 1

Explanation:

1.     1. Cs(262pm)

      2. Rb(244pm)

      3. K(231pm)

      4. Na(186pm)

      5. Li(152pm)

2.    The valency of an element is determined by the number of valence electrons present in the outermost shell of its atom. The number of electrons lost or gained (or shared) by one atom of an element to achieve the nearest inert gas electron configuration, gives us the valency of the element.

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HOPE THIS HELPS................

Explanation: