The atomic numbers of the metallic and non-metallic elements which are liquid at room…
CHEMISTRY · Single correct · CBSE · Chemistry · Classification of Elements and Periodicity in Properties · Classification of Elements and Periodicity in Properties
Problem
The atomic numbers of the metallic and non-metallic elements which are liquid at room temperature respectively are :
(1) 55, 87
(2) 33, 87
(3) 35, 80
(4) 80, 35