Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell?

Assertion (A) : Anything that influences of the valence electorns will affect the chemistry of the element. So, the nuclear molar mass does not affect the valence shell.
Reason (R ) : Nucleus contains protons and neutrons, whereas protons i.e. nuclear charge affects the valence shell but neutrons doe not.

Consider the following statements and arrange in the order of true/false as given in the codes.
$S_1$:In modern periodic table each block contains a number of columns equal to the number of electrons that can occupy that sub-shell
$S_2$:The greatest increase in ionization enthalpy is experienced on removal of electron from core noble gas configuration
$S_3$ :The size of the isoelectronic species is effected by eletron-electron interaction in the outer orbitals
$S_4$:Any thing that influences the valence electrons will affect the chemistry of the element and the valence shell is not affected by nuclear mass.

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Choose the correct answer
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