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Need help with 7,9 and may you check my answer for 8 to ?
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Need help with 7,9 and may you check my answer for 8 to ?

Need help with 7,9 and may you check my answer for 8 to ?-example-1
User Nathan Hanna
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Number 9 is C because they are the same element but different numbers. Number 8 is B because they are isotopes of each other, and isotopes have varying number of protons (that’s what make them isotopes of each other.) Number 7 is B.
User The Jonas Persson
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8 looks right to me but not 100%
User Adray
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