Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Chemistry
Chemistry
Problem
The electron in
He
+
\text{He}^+
He
+
ion is excited to next higher state. The ratio of area of shell of excited state to ground state is : a. 9 b. 4 c. 16 d. 12
Browse the problem library