Chapter 4 Part 2

Front

atom

Back

the smallest unit of any elemental substance that maintains the characteristics of that substance

Front

subatomic particles

Back

a smaller part that helps compose the atom, including protons, neutrons, and electrons

Front

nucleus

Back

the central core of the atom that contains tightly clustered particles of protons and neutrons

Front

proton

Back

a subatomic particle that has a positive electrical charge

Front

neutron

Back

a subatomic particle that is electrically neutral

Front

electron

Back

a subatomic particle with a negative electrical charge that is equal to, but opposite of, the positive charge of protons

Front

orbital

Back

the space occupied by a pair of electrons in an atom

Front

element

Back

a substance that contains only one type of atom; iron, calcium, and potassium are examples

Front

compound

Back

a pure substance in which two or more elements have chemically combined; salt & baking soda are examples

Front

molecule

Back

the basic unit of any compound