teacher wrote the electronic configuration of an element as 2,8,7. what is the atomic number of this element
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As the electronic configuration of the given atom is 2,8,7 it is inferred that the atomic number of element is 17 (2+8+7).Thus element with atomic number of 17 is chlorine. Among the options given which includes Nitrogen, Fluorine, Phosphorus and Argon, chlorine is chemically similar to Fluorine
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17 chlorine atomic configuration is 2,8,7
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