IDNLearn.com connects you with a community of knowledgeable individuals ready to help. Our community provides timely and precise responses to help you understand and solve any issue you face.
Answer:
Thus, helium is the smallest element, and francium is the largest. From top to bottom in a group, orbitals corresponding to higher values of the principal quantum number (n) are being added, which are on average further away from the nucleus, thus causing the size of the atom to increase.