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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