Which element has two shells, both of which are completely filled with electrons?
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 its first shell?
Atoms are said to be completely filled when all the available shells are completely filled with electrons. Which of the following elements has completely filled outermost shell in its atoms?