We’re being asked to rank the elements in decreasing atomic radius .
Atomic radius represents the distance from the nucleus to the outer shell of an element.
The trend of the atomic radius in the periodic table:
• decreases going from left to right of a period
• increases going down a group
Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si and Ar?
a. Mg > Na > P > Si > Ar
b. Ar > Si > P > Na > Mg
c. Si > P > Ar > Na > Mg
d. Na > Mg > Si > P > Ar
e. Ar > P > Si > Mg > Na
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