Elements which have high electronegativities occur in what Group: IA, IIIA, VIIA, IIA, O

they are both synthetic elements

explanation:

d

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).