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Many elements have non-integral atomic m...

Many elements have non-integral atomic masses because

A

they have isotopes

B

their isotopes have non-intergral masses

C

their isotopes have different masses

D

the constituents, neutrons, protons and electrons combine to give rational masses

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The correct Answer is:
A, C
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ALLEN-ATOMIC STRUCTURE-Exercise - 01
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  12. In a certain electronic transition in the hydrogen atoms from an init...

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  13. Match the following - {:((a),"Energy of ground state of" He^(+),(i)...

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  16. The spectrum of He is expected to be similar to.

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