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Question

How many neutrons and protons are there in the following nuclei?
136C,168O,1224Mg,5626Fe,8838Sr

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Solution

The number of neutrons and protons are shown below.
NucleusAtomic number, Z
Mass number, A
Number of protons = atomic number
Number of neutrons =AZ
136C
6 13 6136=7
168O
8 16 8 168=8
2412Mg 12 24 12 2412=12
5626Fe 26 56 26 5626=30
8838Sr 38 88 38 8838=50

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