Question

among Cs, Li,k and Na which is the most reactive with water​

Answer 1

Answer:

Na

Explanation:

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Answer 2

Answer:

potassium k

Explanation:

Potassium behaves rather like sodium except that the reaction is faster and enough heat is given off to set light to the hydrogen. This time the normal hydrogen flame is contaminated by potassium compounds and so is coloured lilac (a faintly bluish pink).

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enthalpy change (kJ / mol)

Li -222

Na -184

K -196

Rb -195