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OpenStudy (anonymous):

isotopes of sulfur is represented as sulfur negative 35 or s- 35 what does the number 35 signify

OpenStudy (anonymous):

35 is sum of number of protons and neutron.

OpenStudy (joannablackwelder):

Yes, the 35 is the mass number or sum of protons and neutrons. The - is a dash, not a negative.

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