Period 7 contains elements in the s, p, d, and f blocks. Suppose that there were a Period 8 and it contained elements in the “g” block, where “g” had the angular momentum quantum number l =4. If a hypothetical element in Period 8 had an atomic number of 120, into what group in the periodic table would the element fit, and what properties might it have (assuming it does not radioactively decay)?

Question

jfraser · Answer

each square on the periodic table is reserved for an atom with a specific number of protons (atomic number) and that number always increases by one as we move left-right across a period. The atom that belongs at the END of period 7 will have an atomic number of 118, if and when it is discovered. Where should element 119 go? and where should 120 follow it?