<P> As the atomic number of elements in Period 3 increases , the atomic radius decreases . </P>
<P> As the atomic number of elements in Period 3 increases , the atomic radius decreases . </P>
in the third period as the atomic number increases from group 1 to group 18 the atomic radius
in the third period as the atomic number increases from group 1 to group 18 the atomic radius
decreases
decreases