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Which of the elements shown has an atomic mass of 20 amu?
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Which of the elements shown has an atomic mass of 20 amu?

User Shammelburg
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Neon has atomic mass of 20

User Avital
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Answer:

they are right its neon but i have the same questions so just search up "neon bohr modle" so you know which answer it is.

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User Orsola
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