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How many neutrons does element X have if it's atomic number is 157
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How many neutrons does element X have if it's atomic number is 157

User MGLondon
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101 Neutrons

The number of neutrons in element X may be calculated by subtracting the number of protons ( 56 ) from the mass number ( 157 ).

157 - 56 = 101
User Andrea T
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