Select the correct answer why night two elements posses similar chemical properties? A. They belong to the same group of the periodic table. B. They have the same physical state ? C. They have similar physical properties D. They belong to the same period of the periodic table

Respuesta :

Answer:

Option A

Explanation:

They belong to the same group of the periodic table. This is because their atoms have the same number of electrons in the highest occupied energy level.