The most electropositive elements-
The first metal used by man-
The mass number of a nucleus-
The graphite rods in the nuclear reactor-
The manufacture of vanaspati from vegetable oil used-
The items amenable to detection by soft x-rays-
In the froth floatation process used oil-
The number of waves in n x 10th Bohr’s orbit –
The main use of salt in the diet –
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is-
