(a) How do the ionic radii of main-group elements vary across a period and down a group? (Select all that apply.) They generally decrease across a period.
They generally increase across a period.
They generally decrease down a group.
They generally increase down a group.

Ifound this on google “these two compounds have a different ionic structure. caesium ion is larger in size when compared to the sodium ion. the charge gets more area to spread out evenly. so caesium chloride has a lower melting point than sodium chloride.” i hope this you for what your looking for

Igonna be honest i dunno that one srry

C. chemical changeshope i : )

There are no metaphors.