Question

Which physical property of the alkali metal group decreases down the group. ( Atomic size, Metallic character, Electronegativity, Density.)​

Answer 1

Answer:

electronegative decreases down the group as the ATOMIC size increases

Answer 2

ELECTRONEGATIVITY DECREASES DOWN THE GROUP.

The alkali metal group (GROUP 1) involve the following elements:

• Lithium
• Sodium
• Potassium
• Rubidium
• Cesium
• Francium

Now, as we go down from top to bottom in the group 1 of the modern periodic table , there is increase in atomic radii. So, the valence electeon tends to be located far away from the nuclei; this results in lesser tendency of nuclei of the elements to pull electrons towards itself.

Hence , the electronegativity of the elements decrease as we go down from Lithium to Francium.

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