Physics

Physics, 01.07.2019 18:00, anthony925513

According to the periodic table, the average atomic mass of helium is a) 2 amu. b) 2.0026 amu. c) 4.0026 amu. d) 6.0026 amu.

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According to the periodic table, the average atomic mass of helium is a) 2 amu. b) 2.0026 amu. c) 4....

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