Question

Which of the following element is reactive than sodium?
(a) iron
(b) potassium
(d) lead
(c) aluminium​

Answer 1

Answer:

option B

Explanation:

The reactivity of group 1 elements increases as you go down the group because the atoms become larger; the outer electron becomes further from the nucleus; the force of attraction between the nucleus and the outer electron decreases; the outer electron is lost more easily.

Answer 2

Answer:

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Explanation:

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According to the reactivity series order of metals, the most reactive element is Potassium(k) which has greater reactivity than Sodium(Na)

How to remember the reactivity order?

Make up a silly sentence in which first letter should be the name of the element...

Examples:

People Say Little Children Make A Zebra Ill Constantly Sniffing Giraffes