Seudónimo Seudónimo

21-09-2016
Chemistry

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How do the atomic mass and atomic number compare for helium?

a) The atomic mass is greater.

b)The atomic number is greater.

c)The atomic mass and atomic number are equal.

d)Helium does not have an atomic number.

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Аноним Аноним

01-10-2016

a) Atomic mass is greater

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