1
The study of the composition, structure, and properties of matter, the processes that matter undergoes, and the energy changes that accompany these processes.
Chemistry
a pure substance that cannot be broken down into simpler, stable substances and is made of one type of atom
Element
A characteristic that can be observed or measured without changing the identity of the substance
Physical Property
● Mercury(II) oxide → mercury + oxygen
List the products and reactants
Products: Mercury (II) Oxide
Reactants: Mercury and oxygen
Basic Research
Carried out to increase knowledge, such as how and why a specific reaction occurs and what the properties of a substance are
Any substance that has a definite composition. Can be produced in a lab, but most are natural
Chemical
a substance that can be broken down into simple stable substances
Compound
Relates to a substance’s ability to undergo changes that transform it into different substances
Chemical Property
Has a fixed composition (homogeneous)
Pure Substance
Applied Research
Carried out to solve a problem
A measure of the amount of matter
Mass
This type of property depends on the amount of matter that is present.
Extensive Property
A change in a substance that does not involve a change in the identity of the substance.
Physical Change
A blend of two or more kinds of matter, each of which retains its own identity and properties
Mixture
Technological Development
Involves the production and use of products that improve our quality of life.
anything that has mass and takes up space
Matter
This type of property does NOT depend on the amount of matter present.
Intensive Property
A change in which one or more substances are converted into different substances is called a chemical change
Chemical Change
Homogeneous
Mixtures that are uniform in composition; also called solutions
Elements arranged in columns
Groups or families
The smallest unit of an element that maintains the chemical identity of that element
Atom
Law of Conservation of Mass
The total amount of matter present before and after the reaction remains the same.
Mass is neither created nor destroyed.
The Law of Conservation of Energy
The total amount of energy present before and after the physical or chemical change remains the same
Heterogeneous
Mixtures that are not uniform throughout
Elements arranged in rows
Periods