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प्रश्न
An atom has 18 neutrons and an atomic number of 17. What is its mass number?
लघु उत्तर
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उत्तर
The atomic number gives the number of protons, so this atom has 17 protons. Its mass number is the sum of protons and neutrons: 17 + 18 = 35. Therefore, its mass number is 35.
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