Ineed for this whole page , mostly 15,16 and 19

For question 15, the correct response would be A. Small atomic radii and high ionization energies, the amount of required energy needed to detach and or remove a single valence electron from the corresponding electron shell the electron that one wishes to remove is from. For Q 16, it would be A. They are extremely reactive, as they can easily remove and or detach a valence electron so that it can be used for transferring to a nonmetal atom, and allow for the formation of an ionic bond. It does not require as much energy to remove a outermost electron and react to form a bond than metal atoms with higher ionization energies.

668900 atoms in total

Compound with sulfer  is bright red