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2 &12. Atomic structure (1)

For each question choose the answer you consider to be the best.1. Which is the correct definition of the atomic number of an atom?A. The total number of neutrons and protons in the nucleus of an atomB. The total number of neutrons, protons and electrons in an atomC. The number of electrons in the outer energy level of an atomD. The number of protons in the nucleus of an atom

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DP Chemistry

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2 &12. Atomic structure (1)