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Some molecules have a symmetrical geometry that causes the polarity of the bonds to cancel each other out.
A good example of this is carbon dioxide. A carbon-oxygen bond is polar, but carbon dioxide contains 2 identical carbon-oxygen bond at 180 degrees to one another. The two bonds with the polarities in opposite directions result in a net dipole moment of zero.
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∙ 13y ago
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∙ 10y agoThe individual bond moments are added together- vector addition effectively dipoles in opposite directions cancel each other out. This means that symmetric molecules with equal and opposite dipoles may have no overall dipole moment. Example is the tetrahedral tetrachloromethane , CCl4 molecule which has polar bonds but these cancel each other out.
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∙ 16y agoConsider A Molecule Of Carbon-di-oxide Which has Covalent Bond and Is a Non Polar-Molecule
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∙ 13y agothe molecule has polar bonds but the molicule itself is unstable
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∙ 9y agoThe overall polarity of a molecule depends on the net total contribution of the individual dipoles. Take CCl4, each C-Cl bond is polar but the dipoles all cancel one another out.
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∙ 11y agoif a molecule have no lone pair in the central atom and all the surrounding atoms are the same, the molecule will be non polar although it has polar bond.. :)
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∙ 13y agoIf a molecule has symmetrical polar bonds, the polarities cancel each other out, and the molecule is non-polar. Examples would be carbon dioxide ( O=C=O ) and methane (CH4).
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Can a molecule be polar with no polar covalent bonds?
No, not necessarily. It all depends on the symmetry of the molecule. Take a look at Carbon dioxide. It has a linear shape like this : O=C=O Although the bonds are obviously polar, the molecule is symmetrical. This makes the polarities of the bonds "cancel" each other, so to speak. So overall, this molecule is non-polar. If you take a look at Hydrogen chloride, on the other hand, it has a shape like this: H-Cl The molecule is assymmetrical, so this is a polar molecule.
Is sulfuric acid polar?
Elemental sulfur and elemental chlorine are non-polar covalent.
Can polar molecules have non polar bonds and still be polar?
I can't see how.Note that the opposite is a different story: it is possible for a molecule to be nonpolar despite having no bonds that are not polar. For example, consider CCl4, which is nonpolar due to its geometry despite the individual C-Cl bonds each having a substantial polarity.
How can a molecule be nonpolar overall and still contain polar bands?
Yes, a molecule can be nonpolar when it contains polar covalent bonds, because think about it. if the molecule is linear in structure, and it has two equally polar bonds on either side, then the polarity will essentially cancel out, and it will become nonpolar.
Is pf3 polar or nonpolar?
PH3 is a non-polar covalent molecule. This is somehow confusing because, when you draw out the Lewis diagram, you will observe a lone pair on the P atom. However, if the electronegativity difference does not have a polar bond, then no matter what happens, it will always be non polar. In this case, the EN is 0.01, which indicates non polar. (Non polar EN is 0~0.4)To decide whether a molecule is polar or non-polar, first draw the Lewis diagram. Then calculate the electronegativity. If the electronegativity is non polar, then no matter it has lone pairs or it has more than one group around the central atom, it will always be non polar. In this case, PH3 is non polar because of it has a non polar bond indicated by the electronegativity even though it has lone pairs.But if the bond is polar, then you might have a chance to get a polar molecule depending on either of these 2 factors:1. If there are lone pairs2. If there are other groups around the central atomFor example, H2O is polar because:1.It has a polar bond for electronegativity2.It has lone pairs(Even if it doesn't have a other groups around the central atom, it's still polar because it's polar if you just satisfy either of the 2 conditions)If both conditions of the above are not met, then it's non polar even if it has a polar bond. Like CO2, a molecule has a polar bond, but fails to meet both of the conditions, is a non polar molecule.Always remember to check your electronegativity. Remember if a molecule only has non polar bonds, then it must be a non polar molecule no matter which condition is satisfied after (ex. lone pairs). If a molecule has polar bonds, then it may be a polar molecule depending on either of the 2 conditions listed.
Can a molecule be non-polar overall but still contain a polar bonds?
yes
How can a molecule nonpolar overall and still contain polar bonds?
Yes, a molecule can be nonpolar when it contains polar covalent bonds, because think about it. if the molecule is linear in structure, and it has two equally polar bonds on either side, then the polarity will essentially cancel out, and it will become nonpolar.
Can a molecule be polar with no polar covalent bonds?
No, not necessarily. It all depends on the symmetry of the molecule. Take a look at Carbon dioxide. It has a linear shape like this : O=C=O Although the bonds are obviously polar, the molecule is symmetrical. This makes the polarities of the bonds "cancel" each other, so to speak. So overall, this molecule is non-polar. If you take a look at Hydrogen chloride, on the other hand, it has a shape like this: H-Cl The molecule is assymmetrical, so this is a polar molecule.
Is sulfuric acid polar?
Elemental sulfur and elemental chlorine are non-polar covalent.
Can polar molecules have non polar bonds and still be polar?
I can't see how.Note that the opposite is a different story: it is possible for a molecule to be nonpolar despite having no bonds that are not polar. For example, consider CCl4, which is nonpolar due to its geometry despite the individual C-Cl bonds each having a substantial polarity.
How can a molecule be nonpolar overall and still contain polar bands?
Yes, a molecule can be nonpolar when it contains polar covalent bonds, because think about it. if the molecule is linear in structure, and it has two equally polar bonds on either side, then the polarity will essentially cancel out, and it will become nonpolar.
Is pf3 polar or nonpolar?
PH3 is a non-polar covalent molecule. This is somehow confusing because, when you draw out the Lewis diagram, you will observe a lone pair on the P atom. However, if the electronegativity difference does not have a polar bond, then no matter what happens, it will always be non polar. In this case, the EN is 0.01, which indicates non polar. (Non polar EN is 0~0.4)To decide whether a molecule is polar or non-polar, first draw the Lewis diagram. Then calculate the electronegativity. If the electronegativity is non polar, then no matter it has lone pairs or it has more than one group around the central atom, it will always be non polar. In this case, PH3 is non polar because of it has a non polar bond indicated by the electronegativity even though it has lone pairs.But if the bond is polar, then you might have a chance to get a polar molecule depending on either of these 2 factors:1. If there are lone pairs2. If there are other groups around the central atomFor example, H2O is polar because:1.It has a polar bond for electronegativity2.It has lone pairs(Even if it doesn't have a other groups around the central atom, it's still polar because it's polar if you just satisfy either of the 2 conditions)If both conditions of the above are not met, then it's non polar even if it has a polar bond. Like CO2, a molecule has a polar bond, but fails to meet both of the conditions, is a non polar molecule.Always remember to check your electronegativity. Remember if a molecule only has non polar bonds, then it must be a non polar molecule no matter which condition is satisfied after (ex. lone pairs). If a molecule has polar bonds, then it may be a polar molecule depending on either of the 2 conditions listed.
What type of chemical bond does water have?
The two hydrogen atoms in water molecule (H2O) are connected to the oxygen via covalent bonds, which means the hydrogen and oxygen share electrons. (The hydrogen-oxygen bonds are primarily covalent rather than ionic.)The molecules in liquid water are said to engage in hydrogen boding between molecules. Water molecules are very polar because the oxygen has a partial negative charge and the hydrogens have partial positive charges. Because it is so polar, water can form hydrogen bonds, where the oxygen from one molecule of water has a strong attraction to the hydrogen atoms in another molecule of water. These H-bonds are strong compared to other intermolecular forces, but still fairly weak compared to the covalent bonds within the water molecules.
When part of a molecule is positive and the other is negative?
If a molecule has different charges at different ends, it is called a polar molecule, or a dipole. Dipoles occur when the electronegativity of the atoms in the molecule force the electrons to be pulled more towards one side. An example of a polar molecule is H2O. Since Oxygen has a greater electronegativity than Hydrogen, the molecules are pulled towards the Oxygen more than they are towards the Hydrogen.There are cases when a molecule seems like it would be polar, but isn't. For instance, CH4 has polar bonds, but the molecule itself is not polar. To determine why, you have to draw out a structural diagram of CH4. Since the Hydrogens (atoms of equal electronegativity) are diametrically opposite one another, the molecule is nonpolar. That does not mean that a molecule like CH2Cl2 would be nonpolar, since there is still a great difference in the electronegativity of Hydrogen and Chlorine.An electronegativity difference of 0.5 or less is considered insignificant.Additionally, what you are referring to may be Vander Waals Forces (or London Dispersion Forces) which create temporary dipoles.
How is a polar-covalent bond similar to an covalent bond?
Polar covalent bonds have a positive end and a negative end. It is likely a partial charge, usually expressed by the symbol d+ or d-, but it's still a difference in charge. Ionic bonds, by their very nature, are polar because they're comprised of ions, which themselves are charged particles. So, polar covalent bonds and ionic bonds each feature a difference in charge based on the sharing or transfer of electrons.
Sharing of electrons in covalent bonds results in polar molecules?
Polar refers to a separation of positive and negative charges. A more positively charged atom is on one side of the molecule and a more negatively charged atom is on the other. Sharing of electrons is not what makes molecules polar. The position of the constituent atoms makes molecules polar. Still, polar molecules would require shared electrons. Compounds with ionic bonds would either dissolve or precipitate.
What happens between atoms in covalent and polar covalent bonds?
covalent bonds is the sharing of electrons between two atoms. polar covalent bonds occurs when one atom is more electronegative than the other and therefore pulls the electron more closely to its atom (the electron is still being shared)
