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25-02-2019
Chemistry

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2. An element's atomic number is the A. number of protons in an atom's nucleus. B. mass of the atom. C. weight of the atom. D. sum of the protons and neutrons in an atom.

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duckerstar146 duckerstar146

25-02-2019

An elements atomic number is the: Number of protons in the atom's nucleus.

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superman1987 superman1987

25-02-2019

Answer:

A. number of protons in an atom's nucleus.

Explanation:

The number of protons in the nucleus in an atom is the atomic number of the element and it is characteristic of a chemical element and determines its place in the periodic table.

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