state the trends in variation of electronegativity in group and periods
Answers
So, as you move down a group on the periodic table, the electronegativity of an element decreases because the increased number of energy levels puts the outer electrons very far away from the pull of the nucleus. Electronegativity increases as you move from left to right across a period on the periodic table.
Explanation:
Electro negativity:--
Electro negativity of an element is defined as the relative tendency or ability of the atom of an element present in a molecule to attract the shared electron pair towards itself.
In Period:-
Electro negativity increases on moving along a period from left to right.This is due to the increase in nuclear charge and decrease in atomic size,as a result of which shared electron pair can be attracted moretowards itself.
In Group:--
Electro negativity decreases from top to bottom in a group due to an increase in the atomic size,as a result of which the shared electron pair is attracted less towards itself..
Electro positivity:--
Electro positive character of an element is its ability to lose one or more electrons to form a positively charged ion.
In Period:--
Electro positive character decreases on moving along a period from left to right.This is due to the increase in ionization potential.
In Group:--
Electro positive character increases from top to bottom in a group due to an decrease in the ionization potential.
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