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In the Periodic Table aluminium is described as [27/13]Al

27 is the Atomic Mass ; the total of all the neutrons protons (nucleons)

13 is the atomic number ; the total of all the protons in the nucleus.

Hencethe total neutrons is the mass subtracted from the number.

27 - 13 = 14 is the total number of neutrons in aluminium.

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lenpollock

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3y ago

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