. The most reactive metal is

(A) Sodium

(B) Magnesium

(C) Potassium

(D) Calcium

Best Answer

Ans. The Correct option is C.

♦ As we understand the chemical reactivity decreases as you move left to right of the periodic table and it will increase as you move down the group within side the case of metals.

♦ This occurs because as you move down the group, it is simpler for electrons to be taken away, which leads to high chemical reactivity and as you move from left to right the elements within side the periodic table have greater electrons of their valence shells, so they're now no longer as reactive in as compared to the metals which have much less valency.

♦ As we've got already discussed, reactivity of alkali metals has a tendency to increase as you move down the group. Thus, sodium is much less reactive with water than is potassium, likewise with the alkaline metals; calcium is greater reactive than magnesium. Also, as the intense left elements have highest radius and lowest ionization energy, which leads to excessive reactivity.

♦ Therefore, out of the above elements, potassium is present at the intense left of periodic and additionally at the bottom function down the organization among the given factors within side the options.

♦ Potassium metal has greater number of shells as compared to sodium and for that reason it turns into easy to remove one electron from its outermost orbital (much less ionization enthalpy).

♦ Therefore, out of given metals, Potassium is the most reactive metallic.

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