The total number of atomic orbitals in the fourth energy level of an atom is .......

$A$ proton moves on a circular path with a constant angular speed. What is the correct relation between its magnetic moment $\vec M$ and angular momentum $\vec L$?

Carbon,silicon,and germanium have four valence electrons each. These are characterized by valence and conduction bands separated by energy band gaps equal to $(E_{g})_{C}$,$(E_{g})_{Si}$,and $(E_{g})_{Ge}$ respectively. Which of the following statements is true?

Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.

On what basis are the three types of lichens classified?

In the isoelectronic series of metal carbonyls,the $CO$ bond strength is expected to increase in the order: