https://www.google.nl/search?q=molecule+charge+distribution&client=firefox-b&dcr=0&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjdiK-ikpvYAhVlJMAKHbqoC_MQ_AUICigB&biw=1176&bih=934#imgrc=AaqPQBulBraS-M: