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Although electrons have mass, they are not considered in determining the mass number of an atom. Why?

Although electrons have mass, they are not considered in determining the mass number of an atom. Why?
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Although electrons have mass, they are not considered in determining the mass number of an atom. Why?

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User OMi Shah
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1 Answer

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Because the most dense part of an atom is the nucleus. Not the electron cloud.
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User Jxn
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