Chemistry [Introduction - Chemical Bonding] Flashcards Preview

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Flashcards in Chemistry [Introduction - Chemical Bonding] Deck (84)
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1

Chemistry

Branch of science that deals with the characterization, composition, transformations, and the energies involved in the matter

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Matter

anything that occupies space and has mass

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Mass

the amount of matter that an object contains
expressed in terms of kilogram

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Properties of Matter

Intensive or Extensive
Physical or Chemical

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Intensive Property

depend on the quality of the matter

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Extensive Property

depend on the quantity of the matter

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Physical Property

directly observed or measured by an instrument

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Chemical Property

requires another substance to react to

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Example of Intensive (10)

Volatility
Viscosity
Malleability
Ductility
Alkalinity
Color
odor
Density
Boiling Point
Freezing Point

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Example of Extensive (3)

Mass
Volume
Length

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Examples of Physical Property (7)

Temperature
Mass
Color
Volatility
Viscosity
Malleability
Ductility

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Examples of Chemical Property (3)

Combustibility
Acidity
Alkalinity

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Classical Phases of Matter

Solid
Liquid
Gas

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Solid

strong attractive force between particles of matter
definite volume and shape

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Two types of Solid

Amorphous - without definite structure
Crystallize - with definite structure

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Liquid

weak attractive force
definite volume and indefinite shape
flows in one direction

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Gas

attractive force is almost inexistant
indefinite volume and shape
flows in random directions

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Physical Change

Transformation from one phase to another
Molecules are not affected

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Chemical Change

involves the formation of a new substance

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Evidences of Chemical Change

Change in color of solution
Formation of a precipitate
Evolution of gas
Absorption or Evolution of heat

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Classification of Matter

Matter : Pure Substance and Mixture

Pure substance: Elements and Compounds
Elements: nonmetals, metals, metalloids
Compound: ionic and covalent

Mixture: Homogeneous and Heterogeneous
Homogeneous: Solutions
Heterogeneous: Colloids and Suspensions

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Pure Substance

Uniform Composition with distinct physical ad chemical properties

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Elements

simplest substance
made up of only one type of atom

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Compounds

made up of two or more different atoms combined in different proportions

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Ionic Compounds

metal + nonmetal

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Covalent Compounds

nonmetal + nonmetal
sharing of electrons

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Mixture

physical combination of two or more substances

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Homogeneous mixture

uniform in composition and properties
a single phase is observable
size of particles are the smallest of all Mixtures

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Components

used to identify substances in a mixture

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Solvent

used to dissolve the solute
usually present in greater amount
determines the state of the matter