What is Chemistry? Flashcards
Chemistry
the study of matter and the change it undergoes
Matter
physical substance - anything that has mass and takes up space
Mass
a measurement that reflects the amount of matter
Pure substance
a chemical - matter that has a definite and uniform composition
mixture
substance made by mixing other substances together
properties
quality of a thing- physical/chemical
physical property
matter not involving in its manifestation a chemical change
Chemical property
characteristic of a particular substance that can be observed in a chemical reaction
Density
a physical property of matter and is defined as the amount of mass per unit volume
Physical Change
reversible change in a physical property
Chemical Change
one chemical substance is transformed into one or more different substances
Homogeneous Mixture
a mixture in which the composition is uniform throughout the mixture uniform composition
Heterogeneous Mixture
a mixture in which the composition is not uniform throughout the mixture- individual substance
Solution
a thing said, written, or done to deal with or as a reaction to a question, statement or situation
Solvent
able to dissolve in substances
Solute
the minor component in a solution
alloys
metallic substance composed of two or more elements as either a compound or a solution
elements
any substance that cannot be decomposed into simpler substances by an ordinary chemical process
chemical symbol
a notation of one or two letters representing a chemical element
atom
a particle of matter that uniquely defines a chemical element
molecule
a group of atoms bonded together
bond
link between atoms in molecules or compounds
compound
any substance composed of identical molecules consisting of atoms of two or more chemical elements
chemical formula
a notation used by scientist to show the number and type of atoms in a molecule
