Chemistry Vocabulary Already Verified
Fundamental Concepts
Matter refers to anything that has mass and occupies space. A substance is a single kind of matter that
has a specific set of properties. Physical properties are characteristics that can be observed without
changing the substance, w...
Chemistry Vocabulary Already Verified
Fundamental Concepts
Matter refers to anything that has mass and occupies space. A substance is a single kind of matter that
has a specific set of properties. Physical properties are characteristics that can be observed without
changing the substance, while chemical properties describe its ability to change into different
substances.
Atomic Structure
An element is a pure substance that cannot be broken down into any other substances by chemical or
physical means. Atoms are the basic particles from which all elements are made. Chemical bonds are
forces of attraction between two atoms, and molecules are groups of two or more atoms held together
by these bonds.
Compounds and Mixtures
A compound is a pure substance made of two or more elements chemically combined in a set ratio. A
chemical formula shows the elements in the compound and their ratio. A mixture, on the other hand, is
made up of two or more substances that are together in the same place but are not chemically
combined. Heterogeneous mixtures have pure substances unevenly distributed throughout, while
homogeneous mixtures have substances evenly distributed.
Physical and Chemical Changes
A physical change is a change in a substance that does not change its identity, whereas a chemical
change produces one or more new substances. The law of conservation of matter states that matter is
not created or destroyed in any chemical or physical change.
Energy
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