Question

A) What is electronegativity ?
B) How does it vary in a group and in a period?​

Answer 1

The higher the electronegativity of an atom, the greater its ability to attract shared electrons. The electronegativity of atoms increases as you move from left to right across a period in the periodic table. The electronegativity of atoms decreases as you move from top to bottom down a group in the periodic table

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Answer 2

Electronegativity, symbol χ, measures the tendency of an atom to attract a shared pair of electrons.

Atomic size is the distance between the centre of the nucleus of an atom and its outermost shell and the atomic radius is defined as theshortest distance between the atom’s nuclei and the outermost shell of the atom.

In general, the atomic radius decreases as we move from left to right in a period with an increase in nuclear charge of the element. The atomic radius increases when we go down a group because of the addition of extra shell.

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