Question

atoms of different elements with the same number of occupied shells are placed in the same period

Answer 1

When atoms collide and react, it is the outer electrons that meet and interact. So, elements in the same group have similar chemical properties because they have the same number of electrons in their outer shell

Thus the subshell has three orbitals. The second shell has 2 subshells: the subshell, which has 1 orbital with 2 electrons, and the subshell, which has 3 orbitals with 6 electrons, for a total of 4 orbitals and 8 electrons

Answer 2

The elements in groups (vertical columns) of the periodic table exhibit similar chemical behavior. This similarity occurs because the members of a group have the same number and distribution ofelectrons in their valence shells. However, there are also other patterns in chemical properties on the periodic table.

Hope it helps:)