Atomic mass always refers to the mass of a neutral atom, not the mass of its bare

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Atomic mass always refers to the mass of a neutral atom, not the mass of its bare nucleus. With this definition in mind, determine by how many electron masses the mass of a parent atom changes when its nucleus emits 

(a) An electron and 

(b) A positron. Ignore the kinetic energy of the emitted particle.

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The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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