Two element with symbol x atomic number 16 and why atomic number 12 are placed in 3rd period of modern periodic table which amongst the two has more metallic character calculate the valency of each element which is smaller in size
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Mg= Atomic no.= 12,... period 3, grp2, has highest mettalic character.
S, Atomic no.= 16, prd 3, grp 16... non metal
valency:
Mg=2, has high radius,
S=-2, +2, +4 & +6 , smaller radius
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