Which of the following statements are correct?
$(A)$ The electronic configuration of $Cr$ is $[ Ar ] 3 d ^{5}$ $4 s^{1}$.
$(B)$ The magnetic quantum number may have a negative value.
$(C)$ In the ground state of an atom, the orbitals are filled in order of their increasing energies.
$(D)$ The total number of nodes are given by $n-2$.
Choose the most appropriate answer from the options given below ....
$(A), (C)$ and $(D)$ only
$(A)$ and $(B)$ only
$(A)$ and $(C)$ only
$(A), (B)$ and $(C)$ only
Transition metals are often paramagnetic owing to
Assertion : $SnI_4$ is an orange solid.
Reason : The colour arises due to charge transfer.
The addition of metals like $Cr,\,Mn,\,W$ and $Ni$ to ordinary steel makes it
Which one of the following does not correctly represent the order of property indicated against it
The statement that is $INCORRECT$ about the interstitial compound is