Question

Arrange Na,Mg,Al,P,S,Si,Cl in increasing order of atomic size.

Answer 1

Cl ,S,P,Si,Al,Mg,Na.

From left to right atomic size decreases in a period.

Answer 2

The elements arranged in increasing order of their atomic size is Cl < S < P < Si < Al < Mg < Na.

Definition of atomic size

The atomic radius of a chemical element is a measurement of the atom's size, usually the average or typical distance between the nucleus's core and the outermost solitary electron.

Size of atom

Atomic size is measured in Angstroms,

1 Angstrom = $10^{-10}$m.

The elements arranged in  according to their increasing atomic size is Cl < S < P < Si < Al < Mg < Na

To know more about atomic properties, here

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