Which statements describe carbon? Check all that apply.

Carbon has atomic number 6, so it has 6 protons. The most common carbon isotope has 6 neutrons, giving it a mass of about 12 amu, and carbon has 4 valence electrons. Thus, the statements that apply are “atomic mass of ~12 amu,” “atomic number of 6,” “6 protons, 6 neutrons,” and “valence of 4.”

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