Which element does not have the same number of electrons in its outermost shell as the other elements in its group?(1 point) Responses bromine (Br) bromine ( b r ) boron (B) boron ( b ) helium (He) helium ( h e ) hydrogen (H)

Question

what is 100% correct?

Answer 1

The element that does not have the same number of electrons in its outermost shell as the other elements in its group is helium (He).

Helium is in Group 18 (the noble gases), where other elements have 8 electrons in their outer shell. Helium has only 2 electrons, which distinguishes it from the rest of the group. The other options (bromine, boron, and hydrogen) all fall into groups with other elements that have similar outer electron configurations.