مصطلحات التشابتر الاول والثاني Flashcards
is the study of matter and the changes it undergoes
Chemistry
is anything that occupies space and had mass.
Matter
is a form of matter that has definite
composition and distinct properties.
Substance
is a combination if two or more substance in which the substances retain their distinct identities.
Mixture
composition of the mixture is the same throughout.
Homogenous mixture
composition is not uniform throughout.
Heterogeneous mixture
can be used to separate a mixture into its pure components without changing the identities of the
components.
Physical means

is a substance that cannot be separated into simpler substances by physical or chemical means.
Element
is a substance composed of atoms of two or more elements chemically united in fixed proportions.
Compound
can be measured and observed without changing the composition or identity of a substance.
Physical property
is a property that requires carrying out a chemical change in order to be observed.
Chemical property
does not alter the composition or identity of a substance.
Physical change
alters the composition or identity of the substance(s) involved.
Chemical change
a material depends on how much matter is being considered.
Extensive property
a material does not depend upon how much matter is being considered.
Intensive property
international system of units.
SI