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A sodium atom contains 11 electrons. What is the atomic number of sodium? |
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Answer» Atomic number for sodium is 11. The mass number is the sum of the neutrons and protons in an atom. Even 11 protons + 12 neutrons= 23. The Atomic number is simply the PROTON number as well as the atomic number is always SEEN at the bottom left CORNER in a ELEMENT of a periodic table. |
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