Covalent Bonds. Atoms can become stable by sharing electrons. Shared e - are part of the outer...
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Transcript of Covalent Bonds. Atoms can become stable by sharing electrons. Shared e - are part of the outer...
Covalent Bonds
Covalent BondsCovalent BondsAtoms can become stable by sharing electrons.Shared e- are part of the outer energy level of both atoms.occurs between elements close to each other on the periodic table (primarily non-metals)NO CHARGES because NO IONS!!
molecule result of 2 or more covalently-bonded atomsdiatomic molecules 2 atoms of same element bonded together in effort to be more stableoccur in nature bonded together instead of as single atomH2, N2, O2, F2, Cl2, Br2, I2BrINClHOF
methane CH4
Sigma bonds single covalent bondsoccur when one electron pair shared in area between 2 atomsouter orbitals of each atom overlap or mergeSome atoms become stable by forming more than one covalent bond.Double two shared pairsTriple three shared pairs
Strength of covalent bond depends on the distance between nuclei (bond length)More bonds, smaller distance, shorter bond length = stronger bondSingle bonds are weaker than double bonds that are weaker than triple bonds.
Draw electron dot diagrams for the following:PH3CCl4CO2Naming Covalent moleculesFirst name stays the same except if subscript is 2 or moreSecond name ending is ide.Always use a prefix with second element.
EX: CO
N2O5
writing formulasDO NOT look for charges!Use prefixes to find subscripts.Subscripts are not always in lowest whole number ratio.EX: dinitrogen tetrafluoride
carbon tetrachloride