Sodium has 11 protons and 12 neutrons. Write the electron configuration of the sodium atom?
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The electron arrangement of all atoms can be found in the data booklet. All the electrons are arranged into energy levels. These energy levels can only hold a certain number of electrons.
The first energy level (the one nearest the nucleus) can hold a maximum of two electrons with the others being able to hold up to a maximum of 8 electrons (only true for the first 20 elements).
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2,8,1 will be the electronic configuration of sodiym element
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