1. which elements had complete outer shells? either two or eight electrons in their outer most shell. give…

1. which elements had complete outer shells? either two or eight electrons in their outer most shell. give the name and (symbol) for each.\na. ____________ (______)\nb. ____________ (______)\nc. ____________ (______)

1. which elements had complete outer shells? either two or eight electrons in their outer most shell. give the name and (symbol) for each.\na. ____________ (______)\nb. ____________ (______)\nc. ____________ (______)

Answer

Brief Explanations:

Elements with complete outer shells are noble gases (except helium which has 2 outer - shell electrons). Helium has 2 electrons in its outer shell (first shell), and neon, argon, krypton, xenon, and radon have 8 electrons in their outer shells.

Answer:

a. Helium (He) b. Neon (Ne) c. Argon (Ar)