In modern periodic table, the atom of the element present at the end of each period has a/an _____ valence shell.
Incomplete
Half filled
Singly occupied
Completely filled
In Modern periodic table, at the end of each period, the valence shell is completely filled.
According to the modern periodic table, the number of electrons in the valence shell of an atom represents its _______in the periodic table.
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?