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andrey2020 [161]
4 years ago
6

A rule or principle that has not changed over a period of hundreds of years, and it is usually

Chemistry
1 answer:
Crazy boy [7]4 years ago
3 0
B) scientific law i think
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nikitadnepr [17]

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6 mass

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Hydrogen is an element with two naturally occurring isotopes: 2 H and 3 H. This means that 2 H, which has a mass number of 2, ha
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