Chemistry, asked by roumit, 1 year ago

what are the conditions for the change in atomic radius in groups and periods of elements in the Modern periodic table? What does it mean?

Answers

Answered by Molikaagrawal

atomic radius increases down the group and decreases when move left to right in period.

roumit: why it occurs?

Molikaagrawal: because the shell increases down the group

roumit: and in periods?

Answered by ALTAF11

In groups:-
The atomic radius increase due to increase in no. of outer most shell.

In periods:-
The atomic radius decrease because the increase in no. of electron in outermost shell.As the electron increase in outermost shell the nuclear force exerted from the nucleus increase and the outermost shell came closer to the nucleus forming small in radius of atom.

ALTAF11: thanks for brainliest!!!

roumit: why the nucleus attracts outermost shell with high number of electrons

ALTAF11: because the electron is negative charge and nucleus contain positive charge ..so they attract.if the no. of electron increase than the force also increase.

ALTAF11: the proton will attract all the nucleus in outermost shell

ALTAF11: *electron

roumit: what does size variation of different elements indicate?

ALTAF11: the change in their size differentiated them by chemical & physical property!

roumit: thank you very much

ALTAF11: my pleasure:)

Anonymous: very good

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