@ somebody on SF (Romeesa Chan),
I saw ur reply about whether the water is said to be a polar molecule or not.. Actually Golden Girl has posted this question here, because as she said, that Whale and I was arguing about this case through chatroom. He doesnt agree of why water molecule is said to be a polar.
My dear so far I agree, that-
1. water molecule is a polar molecule. But in biology we never say water molecule is a polar molecule ONLY. we say water is said to be a dipolar molecule. Am i correct?? The reason is because under the structure of a water molecule, it has one oxygen atom and two hydrogen atoms. One Oxygen atom has slightly negatively charged at its end and TWO not one hydrogen atoms have slightly positively charged at its end.
WE CALLED WATER IS SAID TO BE A DIPOLAR MOLECULE, because under the structure of water molecule, it has two oppositely charged from oxygen to hydrogen ions in left side as well as right side/. Because of two sides, we consider that they have two oppositely charged ions and therefore we called them a dipolar molecule. AM I CORRECT??? if I am wrong, pls correct me..
2. Oxygen atom has slightly negatively charged at its end and two hydrogen atoms have slightly positively charged at its end// But my question is, how oxygen atom became slightly negatively charged and hydrogen atom became slightly positively charged? The reason that I know so far is, because oxygen atom is said to be the highest electronegative element, which is electron lover. That means oxygen atom has its capability to pull the SHARED ELECTRON towards its nucleus away from hydrogen atom. AM i correct. That means I want to know who is pulling the SHARED ELECTRON?? so far I know to pull, it should be unlike charges in the form of attraction. So i thought the protons in the nucleus of an oxygen atom which has positively charged, is the one who pulls the shared electron, which is negatively charged, away from hydrogen atom. BECAUSE of pulling, the oxygen atom is going to gain a new electron , therefore it has become slightly negatively charged at its end, whereas the hydrogen atom is going to lose an electron, so therefore it has become slightly positive charged at its end, by obeying the octet rule of each atom.
I cannot agree , that the oxygen atom has become slightly negatively charged at its end and the hydrogen atom has become slightly positively charged at its end due to in terms of lone pairs./// LONE PAIRS do not do any effect on that, it does in other effect, which brought about different shapes and different value for bond angle from tetrahedron shape to angular bent shape. In oxygen atom , it has 2 lone pairs meaning 4 electrons as well as non-bonding electrons, whereas in hydrogen atom , it has no lone pairs, but it has bonding pairs of electron on one side as well as on other side. Why does it has effect on that, so far I know is, because of the repulsion, the distance between like charges which is lone pair to lone pair. NOT THE DISTANCE BETWEEN LONE PAIR TO THE NUCLEUS OF OXYGEN ATOM- (attraction). So the strength of the repulsion between lone pair to lone pair is greater than the strength of repulsion between lone pair to bond pair and bond pair to bond pair. Therefore new shape of water molecule is arranged in such a way to minimize the repulsion.
hope I hve answered my doubtful well. Pls correct me, if I am wrong. Then i can learn mistakes from u. Pls reply to me urgently.
waitn 4 ur reply asap.
wasalaam.
