Question

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 v
(e) twice as many electrons in its second shell as in its first shell ?

Answer 1

Answer:

a) neon

b) magnesium

c) silicon

d) boron

e) there are 2 options..(1) hydrogen

                                      (2)beryllium

Explanation:

Answer 2

Answer:

a) Neon

b) Magnesium

c) Silicon

d) Boron

e) Carbon

Hope it helps