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Chem 101

Exam 3

TermDefinition
Crystalline solids Have atoms, ions, or molecules are arranged in a definite repeating pattern.
Amorphous solids Lack an ordered internal structure and are randomly arranged.
Ionic solids Are composed of positive and negative ions that are held together by strong electrostatic attractions. Ex: NaCl, NiO2
Metallic solids Are formed by metal atoms. Ex:
Covalent-network solids Have atoms that are held together by a network of covalent bonds. Ex: SiO2, C (diamond/graphite), BN
Molecular solids Are held together by intermolecular forces. Ex: H2O, CO2 , H2
Strong electrolytes Are substances that 100% dissociate upon dissolving to produce ions. Ionic Compounds, Strong acids/bases (NaCl, SrBr2, HNO3, H2SO4)
Weak electrolytes Are substances that only partially (~1 %) dissociate upon dissolving to produce ions Polar compounds (H2O, NH3)
Nonelectrolytes Are substances that dissolve, but do not dissociate to yield ions Organic (C-H) compounds (C6H12O6, CH3OH)
Viscosity Is of a liquid is the resistance to flow.
Surface tension The energy required to increase the surface area of a liquid, or the force required to increase the length of a liquid surface by a given amount.
Adhesion Is the attraction between the molecules of two different substances.
Cohesion Is the attraction between the molecules or atoms of the same substance.
Created by: user-1864799
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