Question

which element has
a) two shells, both of which are completely filled with electrons?
b) a total of three shell, with four electrons in its valence shall?
c) twice as many electrons in its second shall as in its 1st shell?​

Answer 1

Answer:

As shown in , the group 18 atoms helium (He), neon (Ne), and argon (Ar) all have filled outer electron shells, making it unnecessary for them to gain or lose electrons to attain stability; they are highly stable as single atoms. Their non-reactivity has resulted in their being named the inert gases (or noble gases

Answer 2

Answer:

a) carbon. 6 electrons

B) Neon. 10 electrons

C)