Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
+1 vote
700 views
in Chemistry by (34.5k points)
closed by

Why does lanthanum form La3+ion, while cerium forms Ce4+ ion? (Atomic number La = 57 and Ce = 58).

2 Answers

+2 votes
by (36.0k points)
selected by
 
Best answer

1. Electronic configuration Lanthanum is La [Xe] 4f° 5d16s2. By losing three electrons, La acquires stable electronic configuration of Xe and forms La3+.

2. Electronic configuration of Cerium is Ce [Xe] 4f1 5d16s2. By losing four electrons, Ce acquires stable electronic configuration of Xe and forms Ce4+.

+1 vote
by (35 points)

Electronic configuration Lanthanum is La [Xe] 4f° 5d16s2. By losing three electrons, La acquires stable electronic configuration of Xe and forms La3+.
2. Electronic configuration of Cerium is Ce [Xe] 4f1 5d16s2. By losing four electrons, Ce acquires stable electronic configuration of Xe and forms Ce4.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...