Question

Nobel gasses has largest size in periodic table. Explain.​

Answer 1

Answer:

because the outermost shell or the Valence electrons are completely filled and moving down the group the atomic size increase as new shell are always added

Answer 2

Answer:

Answer

All the electrons of noble gas elements are paired(ns2np6 configuration), paired electrons produce  inter electronic repulsions which weakens the effective nuclear force, so electrons tend to move  away from the nucleus because of repulsions. So size of noble gases are bigger than the other elements in their respective periods.