Name the element which has :

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

Which element has twice as many electrons in its second shell as in the first shell?

Name an element which has twice as many electrons in its second shell as in the first shell.

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?