Question

what happens to the atomic size. with 4 group elements and 3 period elements explain with example​

Answer 1

Answer:

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.

Explanation:

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Answer 2

Answer⤵️

Atomic size is the distance between the center of nucleus and the outermost electron in the outer shell. Across a period from left to right there is decrease in atomic size with increase in nuclear charge of the element. Atomic size increases down the group because of addition of extra shell.

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On moving from left to right in a period, the atomic size decreases. More and more electrons are added to same shell. The attraction between nucleus and valence electrons increases with increase in the atomic number.

On moving down the group, from top to bottom, the atomic size increases. This is because with increase in the atomic number, extra shells of electrons are added.