Invar, an alloy of $ Fe$ and $ Ni $ is used in watches and meter scale, its characteristic property is
Small coefficient of expansion
Resistance to corrosion
Hardness and elasticity
Magnetic nature
$Cu(CN)_4^{2 - }$ is colourless as it absorbs light in
The number of $d-$ electrons in $F{e^{2 + }}$ (at no. of $Fe = 26$) is not equal to that of the
Which of the following transition metal is present in misch metal
Explain the variations in atomic radii of transition elements in group.