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प्रश्न
The atom of aluminium is represented by 27Al13. Write down the number of neutrons in the different orbits or shells in one atom of aluminium.
उत्तर
27Al13 Ato,ic mass = (P + n) = A
Atomic number 13 = P = e = Z
Number of neutrons = A − Z = 27 − 13 = 14
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