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How many neutrons does element x have it it’s atomic number is 20 and it’s mass is 88?
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How many neutrons does element x have it it’s atomic number is 20 and it’s mass is 88?

User SSpoke
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88 is the combined mass of the neutrons and protons whereas 20 is just the protons therefore the answer is 88-20=68
User Bobbyz
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