Question

d. Reactive elements have a strong tendency to exist as ions. Of chlorine and
bromine, which element has a strong tendency to exist as ions? Explain your
approach
[2]
I

Answer 1

lthough the bromine nucleus is more positively charged than the chlorine nucleus, the increase in the radius and the extra shielding in the bromine atom outweigh this factor, which means that an electron is more easily attracted into the outer shell of a chlorine atom than that of a bromine atomBromine is more reactive than iodine, but not as reactive as chlorine. Also, bromine has two isotopes: 79Br and 81Br. Bromine consists of bromide salts, which have been found in the sea.

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Answer 2

Statement:

Reactive elements have a strong tendency to exist as ions.

To discuss:

Among chlorine and bromine, which element has a strong tendency to exist as ions?

Explaination:

• First of all, chlorine is more reactive than bromine ( a general thumb rule is that, when we move down the group 17 of periodic table, the reactivity decreases with increase in atomic radius)

• Reactivity of chlorine is more mainly because of its smaller atomic radii, the nucleus exerts higher force on the incoming electron.

• But bromine being of higher atomic radii exerts lesser attractive force to the incoming electron due to more shielding effect from the the non-valence electrons.

• That is why Chlorine has higher tendency to remain as Cl- , as compared to Bromine.

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