Select the appropriate option and complete the following paragraph:
(Metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block.)
On the basis of electronic configuration, elements in the modern periodic table are classified into ___________ blocks. Group 1 and 2 elements are included in __________ and all these elements are metais. (except hydrogen). Group 13 to 18 elements are included in _________ This block contains metals, non-metals and metalloids Group 3 to 12 elements are included. in __________ and all the elements are ___________. Elements shown at the bottom of the periodic table i.e., Janthanides and actinides constitute _________ and all these elements are metals.