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Oduvanchick [21]
2 years ago
6

Helium is in the _______________ period. All elements in

Chemistry
2 answers:
bonufazy [111]2 years ago
6 0

Answer:

Helium is in the __1__ period. All elements in this period have __8__ shells around the nucleus. Also giving brainiest :)

anastassius [24]2 years ago
4 0
I dont know just need points lol but i think its 1 and 8
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The half-life of a radioactive isotope is the amount of time it takes for a quantity of that isotope to decay to one half of its
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Except for the reaction between iron and sulfur, none of the reactions in this
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