Class 9th – VALENCY OF IONS
Valency of ion is equal to the charge of the…
Class 9th – CHEMICAL FORMULAE
It determines the composition of a molecule of the Compound,…
Class 9th – ATOMIC MASS OF AN ELEMENT
Atoms of elements are very small. To understand about atomic…
Class 9th – ATOMS AND MOLECULES
Atoms are indivisible particles which cannot be divided further. The…
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