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LUCKY_DIMON [66]
3 years ago
9

REALLY NEED HELP WITH THESE CHEM QUESTIONS!! IF GOOD AT CHEM PLEASE HELP WILL GIVE BRAINLIEST AND WORTH 30 POINTS!

Chemistry
1 answer:
astraxan [27]3 years ago
6 0
The missing isotope in the equation is going to have the atomic mass and atomic number as the difference between the numbers of the other isotopes mass and atomic number respectively.
atomic mass 210-206= 4
atomic number 84-82= 2
the symbol has to correspond to the element with the atomic number. In this case 2 = He
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