EVERYDAY SCIENCE

Detailed explanation-1: -The second shell can hold 8 electrons. The third shell can hold 32 electrons. Within the shells, electrons are further grouped into subshells of four different types, identified as s, p, d, and f in order of increasing energy.

Detailed explanation-2: -The 2s subshell holds a maximum of 2 electrons, and the 2p subshell holds a maximum of 6 electrons.

Detailed explanation-3: -Electron configuration In the second energy level (quantum number = 2), there are both s and p sub-shells. Again, the s sub-shell can only hold a maximum of two electrons since there is only one orbital within the s sub-shell. The p sub-shell contains three orbitals, so there are six electrons here.

Detailed explanation-4: -Therefore the lithium (Li), which has three total electrons, will have two electrons in the first shell and one electron in the second shell. Notice that lithium is the first element in the second row of the periodic table. The second shell has two subshells (labeled 2s and 2p).