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anshu darshi Grade: 11
        why is atomic radius of Mg is smaller than Na?
6 years ago

Answers : (3)

vijesh jayan
49 Points
										

the atomic radius of Mg is smaller than Na


becoz as we move along a period from left to right there is an addition of extra electron in the shell of an atom, which increses the effective nuclear charge of the atom


increase in nuclear charge of atom means attraction of electrons towards the nucleus and hence the size of the atom decreases


Mg with 2 electrons in its outermost shell has got higher nuclear charge than Na with only 1 electron in its outermost shell


therefore atomic radius of Mg is smaller than Na


 

6 years ago
vijesh jayan
49 Points
										

Mg has got higher nuclear charge effect than Na


due to which the force of attraction of electrons in Mg towards the nucleus increases which results in the contraction of the size of the Mg atom whereas Na has got only 1 electron in its outermost shell and experience less attractive force 


therefore Mg is smaller than Na 


 

6 years ago
Saierangan
13 Points
										I`m the modern periodic table as the atomic number increases to and element the ionisation energy also increase which led to the shrinking of the atomic size elements and it occurs to be small when that the atomic no increases so na with less at no has big atomic size and mg with more at no has smaller size.
										
18 days ago
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