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Foreman/Stapp - 4

Elements and Compounds - 6.5AB

Atom The smallest particle of an element, made of electrons, protons, and neutrons.
Element A pure substance composed of the same type of atom throughout.
Compound A substance made of two or more elements that are chemically combined in fixed amounts.
Substance Any form of matter that is uniform throughout and has consistent properties.
Periodic Table of Elements A table in which all the known elements are arranged by properties and are represented by one or two letters, referred to as chemical symbols.
Lithosphere The rigid, outer part of Earth.
Hydrosphere All of the water on Earth.
Biosphere The sum of all living matter, made of a limited number of elements including oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
Atmosphere The layer of gas surrounding planet Earth, held in place by gravity and composed of a limited number of elements, primarily nitrogen and oxygen.
Matter Anything that has mass and takes up space.
Properties Physical and chemical characteristics of matter used to describe or identify a substance.
Volume A measure of the space that matter occupies.
Mass A measure of how much matter is present in a substance.
Mixture A combination of two or more substances which do not chemically combine.
Uniform Composition Made of the same evenly distributed substance or combination of substances throughout.
Chemical Formula A shorthand notation that uses chemical symbols and numbers as subscripts to represent the type and number of atoms that are present in the smallest unit of the substance
Oceans The largest bodies of water on Earth, covering approximately 71% of Earth’s surface and made up of saltwater
Chemical Symbols One or two letters that represent elements