For example, the formula H 2 O shows that a water molecule contains two hydrogen atoms and one oxygen atom.
For example, magnesium oxide is made up of two elements, magnesium and oxygen. Its formula is MgO. This shows that it has one atom of magnesium for every one atom of oxygen.
ICSE Class 10 Chemistry exam 2026 will be held on March 11. Check section-wise preparation tips, important topics, chemical ...
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