Answer :
Answer: 3) metallic properties and atomic radius
Explanation: reference table s trust me lol
The characteristics both generally decrease when the elements in Period 3 on the Periodic Table are considered in order from left to right is " metallic properties and ionization energy".
What is metallic property?
The reactivity of a particular metal is described by its metallic character.
What is ionization energy?
The minimal energy required to separate one of the most loosely bound electrons of an isolating gaseous atom is known as ionization energy.
The characteristics both generally decrease when the elements in Period 3 on the Periodic Table are considered in order from left to right is " metallic properties and ionization energy".
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