notes ch6 cont - Diatomic molecules include Br,I,N,Cl,H,O,F...

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Atoms bond to lower potential energy and become more stable Chemical bonds form when attraction between nuclei and valence electrons of other atoms binds them together Ionic bonds result from attractions between large numbers of anions and cations To find bonding type- subtract electronegativities Metals and nonmetals form ionic bonds Nonmetals bonding with each other form covalent bonds Ionic bonds transfer electrons but covalent bonds share electrons Ionic bonds have an electronegativity difference of more than 1.7 or more than 50% Polar covalent bonds have an electronegativity difference from 0.3 to 1.7 or 5-50% Nonpolar covalent bonds have an electronegativity difference from 0-0.3 or 0-5%
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Unformatted text preview: Diatomic molecules include Br,I,N,Cl,H,O,F Average distance of bond length is due to vibrations Bond length is measured in pm The shorter the bond is, the stronger it is Bond strength is measured in kj/ml (kilojoules/mole) Octet rule forms so that each atom has an octet of electrons in its highest level before gaining, losing or sharing Duet rule applies to H and He Boron will take less than eight valence electrons Any element in the third period or higher will take more than eight electrons Elements taking more than eight can use the empty d orbital Single bonds are one pair, the weakest and the longest Double bonds are two pairs, stronger and shorter Triple bonds are...
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