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  1. A nucleus represented by the symbol
    A
    X has
    Z
    1. A protons and (Z-A) neutrons
    2. Z  neutrons and (A-Z) protons ​
    3. Z protons and (A-Z) neutrons ​
    4. Z protons and A neutrons
Correct Option: C

A
X has Z protons and (A – Z) neutrons
Z



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