Explain the following according to Modern periodic table: ltbr. (a) Electronegativity of elements increase on moving from left to right in a paeiod. (

Question

Explain the following according to Modern periodic table: ltbr. (a) Electronegativity of elements increase on moving from left to right in a paeiod. (

Explain the following according to Modern periodic table: ltbr. (a) Electronegativity of elements increase on moving from left to right in a paeiod.
(b) Ionisation enthalpy decrease in a group from top to bottom.

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - (a) On moving left to right in a period, tendency of an atom to attract the shared electron pair towards itself increases due to increasing `Z_(eff)`. So, electronegativity of elements increase on moving from left to right in a period.
(b) On moving top to bottom in a group, size increases due to addition of extra shells. So, attraction of nucleus outermost electron decreases. So, ionisation enthalpy decrease in a group from top to bottom.
(a) On moving left to right in a period, tendency of an atom to attract the shared electron pair towards itself increases due to increasing `Z_(eff)`. So, electronegativity of elements increase on moving from left to right in a period.
(b) On moving top to bottom in a group, size increases due to addition of extra shells. So, attraction of nucleus outermost electron decreases. So, ionisation enthalpy decrease in a group from top to bottom.