taylorzharne16 taylorzharne16

21-10-2016
Chemistry

contestada

what is the number after an elements name, representing the sum of its protons and neutrons

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Аноним Аноним

21-10-2016

the answer is electrons

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GutsnGlory GutsnGlory

21-10-2016

The atomic mass number is what you are describing in your question.

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