Consider the group 1a elements sodium (period 3), potassium (period 4), and rubidium (period 5). what would you predict about the ionization energies of these elements?

The given elements are all group one elements so the ionization energy could be rank as Rb>K>Na. Hope this answers the question. Have a nice day.

Ifound this on google “laws of chemical combination. it states that matter can neither be created nor destroyed. it stated that a given compound always contains exactly the same proportion of elements by weight.” i hope this you for what your looking for.

It has to be b i hope this