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oxygen has 6
The valence electrons are the electrons located in the outermost (highest energy) s , or s and p orbitals. You can determine the number of valence electrons from an atom’s electron configuration. In a neutral atom, the number of protons equals the number of electrons. The number of protons is the atomic number.
The atomic number for oxygen (O) is 8, so a neutral oxygen atom has 8 protons and 8 electrons. The electron configuration for a neutral oxygen atom is ##1s^2####2s^2####2p^4##. The outermost (highest) energy level is the 2nd energy level, so the number of valence electrons for a neutral oxygen atom is 6: 2 in the outermost s orbital, and 4 in the outermost p orbital.
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