Classification of crystal


	Classification of crystal
	Strengths Molecular Molecules London dispersion(!polar),dip-dip(polar),hydroogen(h bonded) soft,low-mod.M.P..,poor thermal&electricity conductors Dry ice(CO2),Ch4,Ar,chloroform(CHCl3),I2,ice,HC,Hf,Nh3(solid)l	Weaknesses Ionic Opp. charged ions Ionic bods Hard,brittle,\|M.P.,\|enth. of fusion,poor thermal&elec. NaCl,ZnS,MgO,CaF2,KNO3
	Opportunities Covalent atoms(covalently connected) Covalent bond \|hard,\|\|M.P.,poor thermal&elec. diamond,quartz,silica,silicon carbibde.	Threats Metallic +ve ions surrounded by sea of e- metallic bond soft-hard,low-highM.P.,electrical&heat cond.,malleable All metals

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