atomic number - the number of protons in the nucleus of an atom, Symbol - A one or two letter set of characters that is used to identify an element, atomic mass - the number of protons and neutrons in an atom, Element - A pure substance made of only one kind of atom, Metals - Elements that are good conductors of heat and electric current, Non-metals - elements that are usually dull in appearance, poor conductors of heat and electricity, Metaliods - elements with physical and chemical properties of both metals and nonmetals, Atom - Smallest particle of an element, Protons - Positively charged subatomic particles found in the nucleus of an atom, Neutron - A subatomic particle that has no charge and that is found in the nucleus of an atom, Electron - A subatomic particle that has a negative charge, Nucleus - the center of an atom, which contains the protons and neutrons, Matter - Anything that has mass and takes up space, Periodic Table of Elements - an organizational chart of elements, there are 118 elements on the modern table. The elements are arranged from lightest to heaviest., Periods - Horizontal rows on the periodic table, Groups - Vertical columns on the periodic table,

Periodic Table & Atomic Structure

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