HARDMCQ SINGLEJEE Mains ChemistryInorganic ChemistryPeriodic PropertiesAchiever Section
La (Lanthanum) having atomic number 57 is a member of:
A.s-block elements
B.p-block elements
C.d-block elements✓ Correct
D.f-block elements
Explanation
La (lanthanum) having atomic number 57 belong to d- block as its electronic configuration is 1 2 5 6 Xe d s . Here,the block of the element will correspond to the shell which receives the last electron. Since the last electron is received by the 5d subshell, the block La belongs to is d-block.
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