The physical material of the universe. It is anything that has mass and
occupies space.
Matter
is made up of relatively few elements.
Matter
The smallest building block of matter. Smallest particle that retains the
chemical property of the element (O, He, S).
Atom
Each _______ is made of the same kind of atom
Element
Combination of atoms held together in specific shapes
Molecule
No fixed volume or shape, conforms to
volume and shape of container, is compressible
Gas
,Individual particles are confined to a given volume, liquid flows (no definite
shape) and assumes the shape of its container up to the volume of the liquid,
slightly compressible
Liquid
Rigid with definite shape, very slightly compressible
Solid
these stable diatomics
H2,O2, N2, and the Halogens (F2, Cl2, Br2, I2)
Different samples of any pure compound contain the same elements in the
same proportion by mass
Law of Constant (Definite) Composition
characteristics of a substance. Can be observed without changing a
substance into another substance
Physical Properties
Describes the reactivity of a substance. Can only be observed when a
substance is changed into another substance
Chemical properties:
, Does not depend on amount.
Intensive property :
Depends on amount.
Extensive property
Substances transform into chemically different substances
Chemical change
No change in chemical composition
Physical change
How close to the true value a given measurement is.
Accuracy
How well a number of independent measurements agree with one another.
Precision
occupies space.
Matter
is made up of relatively few elements.
Matter
The smallest building block of matter. Smallest particle that retains the
chemical property of the element (O, He, S).
Atom
Each _______ is made of the same kind of atom
Element
Combination of atoms held together in specific shapes
Molecule
No fixed volume or shape, conforms to
volume and shape of container, is compressible
Gas
,Individual particles are confined to a given volume, liquid flows (no definite
shape) and assumes the shape of its container up to the volume of the liquid,
slightly compressible
Liquid
Rigid with definite shape, very slightly compressible
Solid
these stable diatomics
H2,O2, N2, and the Halogens (F2, Cl2, Br2, I2)
Different samples of any pure compound contain the same elements in the
same proportion by mass
Law of Constant (Definite) Composition
characteristics of a substance. Can be observed without changing a
substance into another substance
Physical Properties
Describes the reactivity of a substance. Can only be observed when a
substance is changed into another substance
Chemical properties:
, Does not depend on amount.
Intensive property :
Depends on amount.
Extensive property
Substances transform into chemically different substances
Chemical change
No change in chemical composition
Physical change
How close to the true value a given measurement is.
Accuracy
How well a number of independent measurements agree with one another.
Precision
