Each period in the periodic table starts with a subshell of the new shell and ends with:

What is a period in modern periodic table ?

The longest period in the Modern Periodic Table is the

What is meant in the periodic table by a period ?

With reference to period 3 of the periodic table - State: The number of electrons in the penultimate shell of the element with valency -1.

There are __________ periods in the periodic table

The s- block elements of the periodic table are those in which the last elctron enters the s-subshell of the____ shell.

Each group of the modern periodic table consists of a number of elements having the similar electronic configuration of the_____shell.