Greetings. I am having some problems with understanding polarity. I will start the problems one by one, whenever one problem is solved i will go to the next one. Ok, here is the first one. I am unable to understand why we say that BeF2 is not polar. When i try to analyze it, i think that we should consider it as a molecule with two negative poles, and some positive charge at the middle (and therefore, polar, right ?). Any help for me to understand this would be appreciated. Thanks.