Chemistry Midterm Exam Review – Matter, Properties &
Changes (Chapter 1)|Verified Questions Complete with A+
Graded Rationales Latest Updated 2026
Chapter 1
Matter and Change
Atom
it is the smallest unit of an element that maintains the chemical identity of that element.
Element
it is a pure substance that cannot be broken down into simpler, stable substances and is
composed of one type of atom.
ex: Au Cu He
Compound
it is a substance that can be broken down into simple stable substances. Each compound is
made from atoms of two or more elements that are chemically bonded.
ex: H2O CO2 C6H12O6
Properties
Extensive
Intensive
Physical
chemical
Extensive property
are characteristics that depend on the amount of matter that is present.
ex: volume, mass, the amount of energy in a substance (a small candy bar vs a large candy
bar)
Intensive property
do not depend on the amount of matter present.
, ex: melting point and boiling point, color, density, ability to conduct electricity, ability to
transfer energy as heat.
Physical property
is a characteristic that can be observed or measured without changing the identity of the
substance.
ex: density, melting point, color, hardness, boiling point, state or phase at room temperature.
Chemical property
relates to a substance ability to undergo changes that transform it into different substances.
ex: the ability to rust, corrode, com-bust or chemically react with another substance
Changes in matter
Physical change
chemical change
Physical change
is a change in a substance that does not involve a change in the identity of the substances.
Changes in state (ex: freezing) are always physical changes.
ex: grinding, cutting, melting and boiling
Chemical change
a change in which one or ore substances are converted into different substances is called a
chemical change of chemical reaction.
ex: burn, rust, corrode, oxidize, bleach, react, tarnish, explode, sour(ing), com-bust
States of Matter
Solid
Liquid
Gas
Plasma
Solid
tightly packed atoms or molecules; definite volume and shape
Changes (Chapter 1)|Verified Questions Complete with A+
Graded Rationales Latest Updated 2026
Chapter 1
Matter and Change
Atom
it is the smallest unit of an element that maintains the chemical identity of that element.
Element
it is a pure substance that cannot be broken down into simpler, stable substances and is
composed of one type of atom.
ex: Au Cu He
Compound
it is a substance that can be broken down into simple stable substances. Each compound is
made from atoms of two or more elements that are chemically bonded.
ex: H2O CO2 C6H12O6
Properties
Extensive
Intensive
Physical
chemical
Extensive property
are characteristics that depend on the amount of matter that is present.
ex: volume, mass, the amount of energy in a substance (a small candy bar vs a large candy
bar)
Intensive property
do not depend on the amount of matter present.
, ex: melting point and boiling point, color, density, ability to conduct electricity, ability to
transfer energy as heat.
Physical property
is a characteristic that can be observed or measured without changing the identity of the
substance.
ex: density, melting point, color, hardness, boiling point, state or phase at room temperature.
Chemical property
relates to a substance ability to undergo changes that transform it into different substances.
ex: the ability to rust, corrode, com-bust or chemically react with another substance
Changes in matter
Physical change
chemical change
Physical change
is a change in a substance that does not involve a change in the identity of the substances.
Changes in state (ex: freezing) are always physical changes.
ex: grinding, cutting, melting and boiling
Chemical change
a change in which one or ore substances are converted into different substances is called a
chemical change of chemical reaction.
ex: burn, rust, corrode, oxidize, bleach, react, tarnish, explode, sour(ing), com-bust
States of Matter
Solid
Liquid
Gas
Plasma
Solid
tightly packed atoms or molecules; definite volume and shape
