Question

Will mark brainliest!

Which of the following elements is the most reactive?

Potassium
Lithium
Sodium
Rubidium

Answer 1

hey there!

your answer is Rb rubidium.

reason.,

1. 1A group elements are alkali metals and their reactivity depends on atomic radii.because by more radii they have low ionization energy and they tend to donate their electrons in some chemical reaction.
2. from top to bottom radii increases and the reactivity also increases.
3. so., Li  < Na <  K  <  Rb

Answer 2

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