why does the atomic radius change down a group/family?\nnumber of protons (effective nuclear charge)…

why does the atomic radius change down a group/family?\nnumber of protons (effective nuclear charge) increases as energy level increases, decreasing the radius of an atom.\nnumber of protons (effective nuclear charge) decreases as energy level increases, decreasing the radius of an atom.\nnumber of layers (shielding effect) increases down a group, therefore making radius bigger\nnumber of layers (shielding effect) decreases down a group, therefore making radius bigger

why does the atomic radius change down a group/family?\nnumber of protons (effective nuclear charge) increases as energy level increases, decreasing the radius of an atom.\nnumber of protons (effective nuclear charge) decreases as energy level increases, decreasing the radius of an atom.\nnumber of layers (shielding effect) increases down a group, therefore making radius bigger\nnumber of layers (shielding effect) decreases down a group, therefore making radius bigger

Answer

Brief Explanations:

As you move down a group in the periodic table, new energy levels (shells) are added. Each new energy level is further from the nucleus, increasing the shielding effect of inner - shell electrons. This reduces the effective nuclear charge experienced by outer - shell electrons, allowing the outer electrons to be further from the nucleus and thus increasing the atomic radius.

Answer:

Number of layers (Shielding effect) increases down a group, therefore making radius bigger