Many elements have non-integral atomic masses | vedclass

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(A) Elements have non-integral atomic masses because they exist as a mixture of isotopes with different masses,which occur in nature in specific propo

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They have isotopes

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(A) Elements have non-integral atomic masses because they exist as a mixture of isotopes with different masses,which occur in nature in specific proportions. For example,Chlorine $(Cl)$ has two isotopes with mass numbers $35$ and $37$,present in a ratio of $3:1$. Therefore,the average atomic mass is calculated as: $\frac{3 	imes 35 + 1 	imes 37}{4} = 35.5 \ u$. Thus,the presence of isotopes with different masses leads to non-integral atomic masses.

Many elements have non-integral atomic masses because:

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