Advertisements
Advertisements
Question
The electronic configuration of lanthanum (At. no. 57) is [Xe] ______.
Fill in the Blanks
Advertisements
Solution
The electronic configuration of lanthanum (At. no. 57) is [Xe] 5d1 6s2.
Explanation:
Lanthanum has an atomic number of 57. After the xenon core [Xe], the next electrons enter the 6s and 5d orbitals. The 4f orbitals start filling only from cerium (Z = 58), not from lanthanum.
shaalaa.com
Is there an error in this question or solution?
