isotopes
isobars
isotones
isomers
The atoms of the elements which have same number of neutrons are called
The biogas used for cooking is a mixture of which of the following
The boiling point of water decreases at higher altitudes is due to
The carbon-carbon bond length is shortest in
The cells that are directly concerned with phagocytosis of foreign bodies in the reticulo-endothelial system are
The charcoal used to decolourise brown sugar solution is
The charge on position is equal to the charge on
The chemical bahaviour of an atom depends upon
The chemical formula of Ammonium phosphate is ..
The chemical name of Common salt is
