a)Arrange the members of a period in the order of I)decreasing atomic radius II) decreasing metallic character b)Select - Chemistry - The Periodic Table

Question

a)Arrange the members of a period in the order of
I)decreasing atomic radius
II) decreasing metallic character
b)Select two element from the group that are
I) less reactive than potassium
II)more than reactive than potassium

Justify the answers also please

Animesh Paul · Accepted Answer

Dear student,

a) I) On moving left to right in a period the atomic radius
decreases and on moving top to bottom in a group the atomic radius
increases

Francium > Cesium > Rubidium > Potassium > Sodium >
Magnesium > Aluminium > Silicon > Phosphorus > Argon
> Chlorine > Lithium

Argon is having more size than chlorine because of Vander wall
radius

II) Metallic character decreases on moving from left to
right in a period and increase on moving from top to bottom in a
group

The decreasing order of metallic character is-

Francium > Cesium > Rubidium > Potassium > Sodium >
Magnesium > Aluminium > Silicon > Phosphorus > chlorine
> argon > Lithium

b) (I) In a group the reactivity of metals increases from top to
bottom

Sodium and Lithium are less reactive than Potassium

(II) Francium and Cesium are more reactive than Potassium

Regards

a)Arrange the members of a period in the order of I)decreasing atomic radius. II) decreasing metallic character. b)Select two element from the group that are I) less reactive than potassium. II)more than reactive than potassium. Justify the answers also please.

a)Arrange the members of a period in the order of
I)decreasing atomic radius.
II) decreasing metallic character.
b)Select two element from the group that are
I) less reactive than potassium.
II)more than reactive than potassium.

Justify the answers also please.