Question

How do the properties of group 1 element different from group 17 element? Illustrate the differences in at least two properties?​

Answer 1

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On the basis of oxides formation.

Group 1 elements (alkali metals)

Oxides of alkali metals are like Sodium oxide (Na₂O), Lithium oxide (Li₂O), Potassium oxide (K₂O) ,Rubidium oxide , etc are basic in nature.

Group 17 elements (halogens)

Oxides of halogens like Dichlorine monoxide (Cl₂O), Dichlorine heptoxide (Cl₂O7) , difluorine dioxide (F₂O₂), etc are acidic in nature.

On the basis of reduction:

Group 1 elements (alkali metals)

Alkalies i.e. group 1 elements are strong reducing agents. The reason behind it was that they are most reactive elements. Due to which it become easy for them to lose electron.

eg:

$\boxed{ \rm K+H_2O \to KOH + H_2}$

Balance equation :

$\boxed{ \rm \red2K+ \red2H_2O \to \red2KOH + H_2}$

so as we can see here as Potassium is more reactive than hydrogen.°. it's able to displace hydrogen from water to form colourless solution of potassium hydroxide (KOH) and H₂

Group 17 element (halogens)

Halogens i.e. group 17 element are not strong oxidizing agents . The reason behind it was that they are least reactive elements due to which it becomes harder to displace elements.

eg:

$\boxed{ \rm{Cu + H_2O \to \: no \: further \: reaction}}$

here as we can see as copper is less reactive element than hydrogen. °. it's unavailable to displace hydrogen from water due to which reaction can't proceed further.

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Must know:

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