April 2019 1 103 Report

j ai besoin de vous pour pb de chimie

chlore: 17 electrons, 35 nucleons, protons ?, neutrons ?

bore :5 electrons, protons ?, neutrons 6, nucleons ?

cuivre : electrons ?, protons 29, neutrons 35, nucleons ?

oxygene : elctrons 8, protons ? , neutrons ?, nucleons 16

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