The element the usually does $NOT$ show variable oxidation states is
$Cu$
$Ti$
$Sc$
$V$
Calculate the magnetic moment of a divalent ion in aqueous solution if its atomic number is $25$
Which of the following has highest ionic radii
The colour imparted by $Co(II)$ compounds to glass is
$E^o$ of $Cu$ is $+0.34\,V$ while that of $ Zn$ is $-\,0.76\,V$. Explain
An ion of definite magnetic moment (spin only) is