The Mass of ¹²C Is 12 U Where 1 U

question 87

Multiple Choice

The mass of ¹²C is 12 u where 1 u = 1.660 559 × 10−²⁷ kg.This mass is equal to

• A)the mass of the ¹²C nucleus.
• B)the mass of the ¹²C nucleus plus 6 electrons.
• C)the mass of the ¹²C nucleus plus 12 electrons.
• D)the mass of 6 protons and 6 neutrons.

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