Which element has : (i) two shells, both of which are completely filled with electrons ? (ii) the electronic configuration ,2, 8,2.
Which element has :
(i) two shells, both of which are completely filled with electrons ?
(ii) the electronic configuration ,2, 8,2.
(iii) a total of three shells, with four electrons in its valence shell ?
(iv) a total of two shells, with three electrons in its valence shell ?
(v) Twice as many electrons in its second shell as in its first shell ?
1 Answers
(i) Neon has two shells, both of which are completely filled with electrons (2 electrons in K shell and 8 electrons in L shell).
(ii) Magnesium has the electronic configuration, 2, 8, 2.
(iii) Silicon has a total of three shells, with four electrons in its valence shell (2 electrons in K shell, 8 electrons in L shell and 4 electrons in M shell).
(iv) Boron has a total of two shells, with three electrons in its valence shell (2 electrons in K shell and 3 electrons in L shell).
(v) Carbon has twice as many electrons in its second shell as in its first shell (2 electrons in K shell and 4 electrons in L shell).