how do you tell if a molecule is polar or nonpolar . for example ASF3 and CF3CL?
452453
No, we don't use the electronegativity chart; instead we draw the full structure of the molecule and then see which 'pulling of bonds' cancel each other. \nIn the molecule AsF3, since As has 5 outer most electrons(in group 5), each F is bonded to As with a single covalent bond. Hence, the shape of the molecule becomes trigonal pyramidal, with 3 bond pairs (with 3 F atoms) and 1 lone pair. The 3 bond pairs pull the electrons towards themselves in the lower plane, while the 1 lone pair pulls at the top. The pulling effect of the 2 F atoms at the 2 sides cancel out  because the pulling effect is the same for both F atoms; however, the pulling effect of the lone pair at the top and the 1 F bond pair at the bottom will not cancel, because it is not from the same atom/species. Hence the overall dipole moment( dipole moment = charge x distance) does not cancel out, so the molecule is polar, with some charge distribution remaining due to the unequal pulling effect.\n\nIn CF3Cl, the shape is tetrahedral, with the 3 Cl atoms and 1 F atom bonded by single covalent bonds to the central C atom. The bond pairs spread out with the 3 Cl atoms pulling at the bottom and the 1 F atom pulling at the top. The pulling effect of the 2 Cl atoms at the sides cancels out, but that of the F atom at the top and the Cl atom at the bottom does not, as the pullin effect of 2 different atoms is different. Hence, as before, overall dipole does not cancel and the molecule is hence polar.
755809
the shape of the molecule of the water is non linear because of the two lone pairs in C atom, therefore the shape of the molecule is non-symmterical. In a non symmetrical molecule, bond dipoles do not cancel out (although bond is polar) so overall, it's polar...\n\nin the case of water, the shape of its molecule is linear with double bonds. There are no lone pairs that will repel the other element, therefore the shape of the molecule is symmetrical. Dipole bond cancel out in the symmetrical molecule so the it does not become polar overall.\n\nsorry i don't know the answer to your second query...
159409
the rule of thumb is "like dissolves like" \nWater is polar so if it dissolves a substance, that substance is also polar.
884272
a polar bond is one which the shared electron, making the bond, is closer to one atom.  A bond between two identical atoms is non-polar because the atoms have the same electronegativity.\n\nElectronegativity is the affinity for an electron.  Fluorine is the most electronegative element and Francium the least.\n\nHydrogen has an electronegativity of 2.2 and fluorine 3.98, prompting the electrons to be closer to fluorine, consequently making the hydrogen partially positive and fluorine slightly negative.
316023
intermolecular polarity and the fact that fluids dont compress the way gases do?
185152
Electronegativity is how much an atom wants electrons. Fluorine has the most electronegativity (3.98 on the Pauling Scale).\n\nConversely, Francium has the least electronegativity (or most electropositivity). It has a value of 0.7 on the Pauling Scale.\n\nAn atom like water is polar because the oxygen is much more electronegative than hydrogen. So, the oxygen atom pulls the electron density toward it, creating a polar molecule.
382009
Oil and turps are nonpolar, water is polar. Those two types of molecules when mixed can't form solutions (ref.).
855406
alkanes are sp3 hybridized and tetrahedral. (there are single bonds between the carbons)\nalkenes are sp2 hybridized and triangular planar. (there is at least one double bond in the carbon chain)\nalkynes are sp hybridized and linear (there is at least one triple bond)\n\nwhether or not they are polar depends on their substituents. if they only have hydrogen atoms attached they will be nonpolar.
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As an ion, oxygen is negative.  As a molecule, 02 is neutral.  \nAn an ion, hydrogen is positive.  As a moleclue, H2 is neutral.
740266
Silver Nitrate is a salt, meaning it's very polar.  But polar/nonpolar is usually used to describe covalent bonds.
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manesiun and fluorine....magnesium forms a positively charged ion, while fluorine forms a negatively charged ion, different charges attract, so they form ionic bond to each other forming a ionic compound.\n\nnitrogen and sulphur both form negative charged ions, so there is noway to make them react unless in a prescence of a catalyst.\n\nionic compounds generally fom using, metals and nonmetals. magnesium is a metal, and fluorine nitrogen and sulphur are all non metals
851182
Yes.  The easiest trick for determining polarity is to evaluate the electronegativity of the atoms.  Oxygen is more negative, while hydrogen is more positive.  If you write the partial charges on the atoms, you see that the charge balance is not equal.  If you had a molecule such as BCl4 (not real, just an example) the B is surrounded evenly by Cl atoms, so there is no polarirty
216835
Sp2 non-polar covalent bond
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polar...water molecules "stick" to each other so to speak...
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non polar  \nit's linear in shape ,so the magnet moment equals zero \nthe lone pairs around the two O atoms \nevery O atom has 2 lone pairs\nthe central atom is C atom
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If you add bromine to an unsaturated hydrocarbon, the bromine will add across the double bond, forming a di-bromo compound.  The solution will change from red-brown to colorless as the bromine is consumed.\n\nPolarization of light occurs when the normally random orientation of electromagnetic energy becomes aligned.  You can detect polarized light using a polarized lens -- one that will only allow a certain orientation of light to pass.  As you rotate the polarized lens, the target will appear to grow darker and then lighter as you rotate through 180°.  It will be darkest when the polarizing lens is at right angles (90°) to the orientation of the polarized light source.
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If it existed, it would be boron pentafluoride, but as far as I know, this is not a stable molecule.\n\nAre you sure you don't mean BrF5 (bromine pentafluoride), which does exist as a stable molecule?