A sodium atom contains 11 electrons. What is the atomic number of sodium?
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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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Atomic Number of Sodium is 11
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