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Topic: Polar covalent bond

	Polar covalent bond - Wikipedia, the free encyclopedia
		A polar covalent bond is a form of covalent bonding that happens when atoms of two different elements with different electronegativities bond resulting in an unequal sharing of electrons.
		The bonding electrons in such bonds are associated more with the more electronegative atom than the other.
		This produces a molecular dipole or polar molecule.
	en.wikipedia.org /wiki/Polar_covalent_bond (194 words)

	Chemical bond - Wikipedia, the free encyclopedia
		The type of strong bond depends on the difference in electronegativity and the distribution of the electron path to the atoms that are bonded.
		Covalent bonding is a common type of bonding, in which the electronegativity difference between the bonded atoms is small or non-existent.
		Polar covalent bonding is by nature an intermediate type of bond, between a covalent bond and an ionic bond.
	en.wikipedia.org /wiki/Chemical_bond (1847 words)

	III
		In a covalent bond an electron pair is shared between two atoms to achieve a stable, outer shell.
		In a non-polar covalent bond, the electron pair is equally shared, the bond is not polarized e.g.
		Hydrogen bonds arise from the weak electrostatic attraction of the partial charges in adjacent polar covalent bonds.
	fajerpc.magnet.fsu.edu /Education/2010/Lectures/3_Chemical_Bonds.htm (369 words)

	[No title]
		We say that the bond is polar covalent, meaning that the bond consists of electrons shared between two atoms (therefore covalent) but shared unequally, thus giving the bond a positive and a negative end, a condition described by the term polar.
		In summary, then, the three types of bonds are: (1) a covalent bond, in which the electrons are shared equally; (2) a polar covalent bond, in which the electrons are shared unequally; and (3) an ionic bond, in which electrons are transferred from one atom to the other.
		Bonds with the highest degree of ionic character are formed by the reaction of alkali or alkaline earth metals with the halogens, particularly with fluorine or chlorine.
	genchem.chem.wisc.edu /sstutorial/Text7/Tx71/tx71.html (1882 words)

	The Covalent Bond
		A single covalent bond is a bond in which two atoms are held together by sharing two electrons.
		Covalent bonds form between atoms when ionic or metallic bonding is unlikely because the gain or loss of electrons requires large amounts of energy.
		A covalent bond in which electrons are shared unequally is called a polar covalent bond; one atom acquires a partial negative charge (d -) and the other acquires a partial positive charge (d +).
	www.cartage.org.lb /en/themes/Sciences/Chemistry/Inorganicchemistry/Informationbonding/CovalentBond/CovalentBond.htm (727 words)

	Chemical Bonding (Site not responding. Last check: 2007-10-18)
		Ionic Bonding: It is due to the electrostatic attraction between a cation and an anion that results from the loss of an electron from an alkali or alkaline earth metal and its gain by a nonmetal.
		A group of atoms that are united by covalent bond is called a molecule and the substance made of molecules is called a molecular compound.
		Polar covalent bonds tend to have dipole moments and bond polarity.
	www.mvhs.fuhsd.org /kavita_gupta/chap6notes.htm (534 words)

	The best Polar covalent bond Online (Site not responding. Last check: 2007-10-18)
		Covalent bonds are formed as a result of the sharing of one or more pairs of bonding electrons.
		Polar and Nonpolar Types The very striking differences in properties between extreme polar and the We may next consider the double bond in which four electrons are held conjointly by two atoms.
		Covalently bonded hydrogen and carbon in a molecule of methane.
	www.1bond81.info /i-bond/polar-covalent-bond.html (1363 words)

	PRINCIPLES OF NEUTRON PHYSICS. Valery Feodorovich Andrus. CHEMICAL BONDS (Site not responding. Last check: 2007-10-18)
		In case of the non-polar covalent bond, the formed by the common electron pair electron cloud, or the bond electron cloud is distributed in the space symmetrically about nuclei of both atoms.
		Non-polar covalent bond by neutron physics (NP) is a coupling of two needles with their ends in vertical into the gravitational flow with overcoming magnetic repulsive forces, for instance, two South poles with opposite twisting (spins) in two identical Helium “hedgehogs”.
		Polar covalent bond by NP is a coupling of two needles of various “hedgehogs” elements with their ends in vertical with overcoming magnetic repulsive forces (of two South poles) with opposite twisting (spins).
	ntpo.com /physics/opening/open2000_2en/20.shtml (1925 words)

	Chemical Bonding
		Bond energy is the energy involved in the process of a bond forming and breaking.
		A Double Bond is a covalent bond in which four electrons (two pairs) are shared by the bonding atoms.
		A Triple Bond is a covalent bond in which two atoms share three pairs of electrons.
	www.avon-chemistry.com /chem_bond_explain.html (1979 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		Polar covalent bonds are a particular type of covalent bond.
		In a polar covalent bond, the electrons shared by the atoms spend a greater amount of time, on the average, closer to the Oxygen nucleus than the Hydrogen nucleus.
		The biological consequence of polar covalent bonds is that these kinds of bonds can lead to the formation of a weak bond called a hydrogen bond.
	academic.brooklyn.cuny.edu /biology/bio4fv/page/polar_c.htm (203 words)

	Bond Dipole Moments (Site not responding. Last check: 2007-10-18)
		The amount of charge that is separated within a polar covalent bond due to the unequal sharing of the bonding electrons depends in an extremely complicated manner on the electronegativity difference between the two bonding partners.
		The bonding partner with the higher electronegativity displays the extra negative charge (negative end because its nucleus is now surrounded by slightly more lectrons than it contains protons); the bonding partner with the lower electronegativity suffers the lack of negative charge (positive end because the charge of its nucleus is no longer completely shielded).
		The distance of charge separation depends primarily on the length of the bond and this bond length is affected strongly by the atomic radii of the bonding partners.
	www.towson.edu /~debye/chem110/handouts/110_bond_dipole_moments.html (234 words)

	Visionlearning Glossary
		A covalent bond in which electrons are equally shared between bonding atoms.
		A non-polar covalent bond is formed when both atoms participating in a bond have an equal or nearly equal affinity for electrons (electronegativity).
		Non-polar molecules are formed by non-polar covalent bonds or when polar covalent bonds result in a symmetric distribution of electrical charge, the configuration + - - + for example.
	www.visionlearning.com /library/glossary.php?a=N&l=1 (378 words)

	Visionlearning Glossary
		Polar Covalent Bond A covalent bond in which electrons are unequally shared between bonding atoms.
		A polar covalent bond is formed when one atom participating has a stronger affinity for electrons, or electronegativity, than its bonding partner.
		A polar bond will result in an equal distribution of electron charge across the bonding pair.
	www.visionlearning.com /library/pop_glossary_term.php?oid=1552&l= (53 words)

	Bond Polarity (Site not responding. Last check: 2007-10-18)
		Bond polarity is a useful concept for describing the sharing of electrons between atoms
		A polar covalent bond is one in which one atom has a greater attraction for the electrons than the other atom.
		The sharing of electrons in HF is unequal: the fluorine atom attracts electron density away from the hydrogen (the bond is thus a polar covalent bond)
	wine1.sb.fsu.edu /chm1045/notes/Bonding/Polarity/Bond05.htm (491 words)

	Bond polarity Answer Key
		In the case of a polar covalent bond, label the polarity.
		The bond between carbon and hydrogen in a CH molecule.
		The bond between carbon and oxygen in a carbon dioxide molecule.
	www.saskschools.ca /curr_content/chem20/covmolec/plryrtnk.html (216 words)

	CHEM111 - Polar vs Nonpolar (Site not responding. Last check: 2007-10-18)
		Polar bond = simply a type of covalent bond in which the electrons are shared but not equally.
		Polar molecule = a molecule in which the polar bonds are disposed in such a way that it imparts an asymmetry to the molecule as a whole.
		First look at each chemical bond in the molecule and determine whether it is a polar bond or not.
	gemini.tntech.edu /~snorthrup/chem111/polar.html (446 words)

	Answers for Bonding (Site not responding. Last check: 2007-10-18)
		The bond is mostly due to the electrostatic attraction of the oppositely charged ions.
		In a covalent bond between nonmetals, one electron from each is used to form a pair which is shared between them.
		Since in a polar covalent bond the sharing of the electrons is not equal, one can see that an ionic bond is really an extreme example of a polar covalent bond.
	home.att.net /~v.d.singleton/genchem/bondans.htm (423 words)

	bondpertab (Site not responding. Last check: 2007-10-18)
		Ionic, Covalent and Polar Covalent Bonds and Sibling Rivalry
		This is now like a polar covalent bond, where the less electronegative ("stronger") atom shares the electrons "more" than the other atom, though each atom often contributes an equal number of electrons.
		Thus a covalent bond was a partnership of valence electrons.
	educ.queensu.ca /~science/main/concept/chem/c07/C07TPSU3.html (633 words)

	Covalent bonds (Site not responding. Last check: 2007-10-18)
		Covalent bonds are forces that hold atoms together.
		Covalent bonds represent chemical potential energy that can be used in biological reactions.
		In Biological systems, polar covalent bonds are important because these kinds of bonds allow the formation of another kind of weak bond called a hydrogen bond.
	academic.brooklyn.cuny.edu /biology/bio4fv/page/covalenb.htm (222 words)

	13
		Molecules adjust their shape so that bonds (single, double and triple) and lone pair electrons are as far away from each other as possible.
		A bond in which such uneven sharing of electrons occurs is termed a polar covalent bond.
		The polar covalent bond is an intermediate between a purely covalent bond and an ionic bond.
	darkwing.uoregon.edu /~ch111/L13.htm (576 words)

	ROCO Resonance: Everything
		This kind of bond appears in the many groups -- C=O, CN (double and triple), and N=O -- and organic chemists unanimous agree that these groups are resonance hybrids.
		The covalent bond in H2 is nonpolar, and Pauling suggested that it should be viewed as a superposition of resonance forms IX and X: (Let me clarify the meaning of these drawings.
		Covalent bonds, both polar and nonpolar, should be viewed as a superposition of simpler wave functions.
	academic.reed.edu /chemistry/roco/Resonance/everything.html (723 words)

	Electronegativity
		Electronegativity values are useful in determining if a bond is to be classified as nonpolar covalent, polar covalent or ionic.
		Nonpolar Covalent: This type of bond occurs when there is equal sharing (between the two atoms) of the electrons in the bond.
		Polar Covalent: This type of bond occurs when there is unequal sharing (between the two atoms) of the electrons in the bond.
	dbhs.wvusd.k12.ca.us /webdocs/Bonding/Electroneg-Bond-Polarity.html (636 words)

	Media Portfolio
		Bond dissociation energy (D) is the amount of energy required to break a bond in a molecule in the gaseous state.
		In the annotated structures, a line represents a bond that lies in the plane, a dashed line (or dashed wedge) represents a bond that is pointed away from the viewer, and a solid wedge represents a bond that is pointed towards the viewer.
		The carbon-carbon double bond consists of one s bond from the head-on overlap of sp2 orbitals and one p bond from the sideways overlap of p orbitals.
	wps.prenhall.com /wps/media/objects/602/616516/Chapter_07.html (1765 words)

	3c. Rules of the Atomic Playground: Polar Covalent Bonds [Beyond Books - Introduction to Chemistry Concepts]
		This means that sometimes in a covalent bond the electrons are not shared equally between the two atoms.
		In an action that resembles toddlers tugging on a toy, a polar covalent bond occurs when one atom with a higher electronegativity draws the bonding electrons toward itself, pulling those electrons away from the atom with the lower electronegativity value.
		The larger the absolute difference in electronegativity between two atoms, the more polar that bond is. For example, the electronegativity difference of a carbon-oxygen bond is -1.0, the result of 2.5 (the electronegativity value for carbon) minus 3.5 (the value for oxygen).
	www.beyondbooks.com /psc92/3c.asp?pf=on (526 words)

	Zum8 (Site not responding. Last check: 2007-10-18)
		The first deals with the property of an atom within an molecule and is related to bonding the second is a property of an atom as an atom.
		A polar covalent bond is a type of covalent bond, arising from the sharing of electrons, but the sharing of electrons between the two atoms is unequal (Zum p.
		Bond energies give a much less accurate estimate since they are tabulated for species that are gases.
	www.chem.ucalgary.ca /undergrad/courses/f01/chem201/Zum8.htm (937 words)

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