Question

EXPLAIN REARRANGEMENT OF ATOMS IN A CHEMICAL CHANGE WITH EXAMPLE ?

Answer 1

When a chemical reaction takes place, reactants are changed to products. Atoms of reactants are rearranged to make the products or we can say that, number of atoms of each element is same in both the side of the reaction.
For eg. - Take a reaction,
1) NaOH + HCl $\to$NaCl + H₂O
Here, Atoms of Na(sodium), O(oxygen), Cl(Chlorine) ,and H(hydrogen) on both the sides are same, they just have rearranged themselves. Na has rearranged itself form NaOH to NaCl. So after rearrangement of these atoms, new compounds NaCl and H_​2O are formed.
2) 2Na + 2H₂O $\to$2NaOH + H₂
3) CuO + H₂ $\to$Cu + H₂O
here, oxygen atom is rearranged from CuO to H₂O.