Which are the short periods of the modern periodic table?
The correct options are
A Period 2
C Period 3
There are total 8 elements in each of the periods 2 and 3. These periods are known as short periods. The second period contains the elements Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine and Neon. The third period contains the elements Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulphur, Chlorine, and Argon.