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