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Chemistry 7 Online
OpenStudy (anonymous):

plz help Which isotopes have the same number of neutrons? superscript 12 over subscript 6 C superscript 19 over subscript 9 F superscript 20 over subscript 10 Ne superscript 23 over subscript 11 Na

OpenStudy (anonymous):

@NoDino @aaronq

OpenStudy (anonymous):

No clue sorry.

OpenStudy (anonymous):

dam tanks tho What is the mass number of superscript 207 over subscript 82 Pb? 289 207 125 82

OpenStudy (anonymous):

can u help me

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