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How many neutrons does element ex have if it's atomic number is 58 and it's mass numbers 156

User Chris Voth
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It would have 98 neutrons.

Step-by-step explanation:
The formula for finding neutrons when given the atomic number and the mass is to do (mass - atomic number.) In this case, the mass is 156 and the atomic number is 58. So we subtract 156 - 58, which gives us 98. Therefore, it would have 98 neutrons.
User Utkrist Adhikari
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