Periodic Table of Elements - Answers A chart that contains all of the chemical elements in order of
increasing atomic number, organized by Groups & Periods.
Dmitri Mendeleev - Answers 1st person to create the PTOE.
Atomic Number - Answers the number of protons in the nucleus of an atom & it organizes the PTOE.
Group - Answers set of chemical elements in the same vertical column of the periodic table.
Period - Answers set of chemical elements in the same horizontal row of the periodic table.
Physical/Chemical Properties - Answers characteristics of elements on the PTOE.
Atom - Answers the smallest unit of matter that has properties of a chemical element.
Element - Answers a pure substance which cannot be broken down by chemical means.
Matter - Answers anything that has mass & volume.
Metal - Answers Left side of PTOE. A substance with these properties: high electrical/thermal
conductivity, high luster, high malleability, MP (melting point)/BP (boiling point), etc.
Non-Metal - Answers Right side of PTOE. A substance with these properties: poor electrical/thermal
conductivity, low luster, brittle, low MP (melting point)/BP (boiling point), etc.
Metalloid - Answers A substance that shares properties of both metals & nonmetals.