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CHEMICAL BONDING IONIC BONDS COVALENT BONDS METALLIC BONDS

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Text of CHEMICAL BONDING IONIC BONDS COVALENT BONDS METALLIC BONDS

  • CHEMICAL BONDINGIONIC BONDSCOVALENT BONDSMETALLIC BONDS

  • IONIC BONDINGWhen an atom of a nonmetaltakes one or more valence electronsfrom an atom of a metalso both atoms end up witheight valence electrons

  • IONIC BONDINGIS THE COMPOUND AN IONIC COMPOUND?

  • IONIC BOND FORMATIONNeutral atoms come near each other. Electron(s) are transferred from the Metal atom to the Non-metal atom. They stick together because of electrostatic forces, like magnets.

  • IONIC BONDINGION any atom with more orless electrons that it issupposed to have**Remember that the number of electronsis supposed to be equal to the number ofProtons if the atom has a neutral charge

  • IONIC BONDINGMetals will tend to lose electrons and becomePOSITIVE CATIONS

  • IONIC BONDINGNonmetals will tend to gain electrons and becomeNEGATIVE ANIONS

  • Na+1 is called a sodium ion

    The +1 symbol means ithas lost one electronIONIC BONDING

  • Mg+2 is called a magnesium ion

    The +2 symbol means ithas lost two electronIONIC BONDING

  • S-2 is called a sulfide ion

    The -2 symbol means ithas gained two electronIONIC BONDING

  • Cl-1 is called a chloride ion

    The -1 symbol means ithas gained one electronIONIC BONDING

  • IONIC BONDING

    Group#123-12131415161718Valence Electrons121-2345678 (except He)Gain or lose e-Lose 1Lose 2Lose 1-2Lose 3ShareGain 3Gain 4Gain5DOES NOT BONDIon charge1+2+1+ or 2+3+3-2-1-

  • Properties of Ionic CompoundsCrystalline structure.A regular repeating arrangement of ions in the solid.Ions are strongly bonded.Structure is brittle.High melting points- because of strong forces between ions.

  • Do they Conduct?Conducting electricity is allowing charges to move.In a solid, the ions are locked in place.Ionic solids are insulators.When melted, the ions can move around.Melted ionic compounds conduct.First get them to 800C.Dissolved in water they conduct.

  • ExamplesSaltsFertilizersBaking soda

  • COVALENT BONDINGWhen an atom of one nonmetalshares one or more electronswith an atom of another nonmetal so both atoms end up witheight valence electrons

  • COVALENT BONDINGWhen a covalent bond is made it forms a molecule. A molecule is a group of atoms held together by a chemical bond.

  • COVALENT BONDING

  • COVALENT BONDINGIS THE COMPOUND A COVALENT COMPOUND?YES since it is made of only nonmetal elements

  • Covalent bondingFluorine has seven valence electrons

  • Covalent bondingFluorine has seven valence electronsA second atom also has seven

  • Covalent bondingFluorine has seven valence electronsA second atom also has sevenBy sharing electrons

  • Covalent bondingFluorine has seven valence electronsA second atom also has sevenBy sharing electrons

  • Covalent bondingFluorine has seven valence electronsA second atom also has sevenBy sharing electrons

  • Covalent bondingFluorine has seven valence electronsA second atom also has sevenBy sharing electrons

  • Covalent bondingFluorine has seven valence electronsA second atom also has sevenBy sharing electrons

  • Covalent bondingFluorine has seven valence electronsA second atom also has sevenBy sharing electronsBoth end with full orbitals

  • Covalent bondingFluorine has seven valence electronsA second atom also has sevenBy sharing electronsBoth end with full orbitalsFF8 Valence electrons

  • Covalent bondingFluorine has seven valence electronsA second atom also has sevenBy sharing electronsBoth end with full orbitalsFF8 Valence electrons

  • COVALENT BONDINGSome molecules dissolve in water and some do not.

    Low melting points and boiling points- molecules are easily separated Poor conductors

  • ExamplesWaterCarbon dioxideGasolineDNAPlasticSugarDiamond

  • Covalent Bondshttps://smartsite.ucdavis.edu/access/content/user/00002950/bis10v/media/ch02/bond_types.html

  • Metallic BondsForms between metal atoms Metals hold onto their valence electrons very weakly. WEAK BONDSThink of them as positive ions floating in a sea of electrons.

  • Sea of ElectronsElectrons are free to move through the solid.Metals conduct electricity.

  • Metals are MalleableHammered into shape (bend).Ductile - drawn into wires.

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