Intro to PURE substances (elements and compounds)

mixture

A combination of two or more substances that are NOT chemically combined

solution

A homogeneous mixture of two or more substances

heterogeneous mixture

A mixture in which different materials can be distinguished easily

homogeneous mixture

A mixture in which substances are evenly distributed throughout the mixture

alloy

A mixture of two or more metals

anion

A negatively charged ion

element

A pure substance made of only one kind of atom

pure substance

A sample of matter, 100% either a single element or a single compound

compound

A substance made up of atoms of two or more DIFFERENT elements joined by chemical bonds

chemical bond

NEW substances are formed with VE (shared, transferred, sea)

atom

One particle of an element

stable

a compound that has full outer energy levels, stops creating bonds with other atoms

diatomic molecule

a molecule of two atoms of the same element in nature (H2, N2, O2, F2, Cl2, Br2, I2) only

cation

an atom with a positive charge ion+

molecules

bonded compounds that SHARE valence electrons ex H20, DNA

chemical properties

elements and compounds have predictable properties chemical and physical

physical properties

elements and compounds have predictable properties that can change without breaking bonds

20,000,000

number of possible compounds (natural & man-made)

valence electron

the ONLY electron that can be shared, transferred or create a SEA of VE

infinite number

the amount of mixtures that can be made

constituent atoms

the atoms that make up a compound