Question

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

Answer 1

Answer:

a) magnesium(Mg)

b) silicon(Si)

c) boron(B)

d) carbon(C)