Which of the following is not a transition metal?
$La$
$Zn$
$Mn$
$Cr$
$Zn$ and $Cd$ metals do not show variable valency because
Calculate the magnetic moment of a divalent ion in aqueous solution if its atomic number is $25$
Which one of the following compounds is not coloured
A metal, $M$ forms chlorides in its $+2$ and $+4$ oxidation states. Which of the following statements about these chlorides is correct ?
Chloride of which of the following element is coloured