Which element has (a) two shells, both of which are completely filled with electrons ? (b) the electronic configuration 2, 8, 2 ? (c) a total of three shells, with four electrons in its valence shell ? (d) a total of two shells, with three electrons in its valence shell ? (e) twice as many electrons in its second shell as in its first shell ?

Which element has (a) two shells, both of which are completely filled

1.	Which element has (a) two shells, both of which are completely filled with electrons ? (b) the electronic configuration 2, 8, 2 ? (c) a total of three shells, with four electrons in its valence shell ? (d) a total of two shells, with three electrons in its valence shell ? (e) twice as many electrons in its second shell as in its first shell ?
Answer» Solution :Neon (2, 8) (b) MAGNESIUM (2, 8, 2) (c) Silicon (2, 8, 4) (d) Boron (2, 3) (E) CARBON (2, 4)