Which characteristics both generally decrease when the elements in Period 3 on the Periodic Table are considered in order from left to right?

(1) nonmetallic properties and atomic radius

(2) nonmetallic properties and ionization energy

(3) metallic properties and atomic radius

(4) metallic properties and ionization energy

Answer : Option 2) Nonmetallic properties and ionization energy

Explanation : It is observed that the nonmetallic properties and the ionization energy when the elements in period 3 on the periodic table are considered in order from left to right.

Various changes are observed when we move from left to right in period 3 in the modern periodic table like the atomic number and charge on the nucleus increases, number of valence electrons increases, atomic radius decreases, first ionization energy increases, electro negativity increases except in Ar, elements found on the left are metals and elements on the right are non-metals, so non metallic character increases.

It would be the characteristics of " (2) nonmetallic properties and ionization energy" that both generally decrease when the elements in Period 3 on the Periodic Table are considered in order from left to right.