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Question
How many neutrons and protons are there in the following nuclei?
`""_6^13"C"`, `""_8^16"O"`, `""_12^24"Mg"`, `""_26^56"Fe"`, `""_38^88"Sr"`
Solution
`""_6^13"C"` -
Atomic mass = 13
Atomic number = Number of protons = 6
Number of neutrons = (Atomic mass) – (Atomic number)
= 13 – 6 = 7
`""_8^16"O"` -
Atomic mass = 16
Atomic number = 8
Number of protons = 8
Number of neutrons = (Atomic mass) – (Atomic number)
= 16 – 8 = 8
`""_12^24"Mg"` -
Atomic mass = 24
Atomic number = Number of protons = 12
Number of neutrons = (Atomic mass) – (Atomic number)
= 24 – 12 = 12
`""_26^56"Fe"` -
Atomic mass = 56
Atomic number = Number of protons = 26
Number of neutrons = (Atomic mass) – (Atomic number)
= 56 – 26 = 30
`""_38^88"Sr"` -
Atomic mass = 88
Atomic number = Number of protons = 38
Number of neutrons = (Atomic mass) – (Atomic number)
= 88 – 38 = 50
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