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Properties of Matter (EPISD 8th grade)

Element The smallest substance that retains its properties
Periodic table Grouping of elements invented by Mendeleev
Metal An element that tends to be hard and shiny
Nonmetal Elements on the top right of the periodic table
Metalloid Elements on the stair-step of the periodic table
Period A row on the periodic table
Family Another word for a group on the periodic table
Group Another word for a family on the periodic table
Dimitri Mendeleev Inventor of the periodic table
Reactants The substances you start with at the beginning of a reaction
Products The substances yielded by a chemical reaction
Yields The arrow in a chemical formula
Valence The electrons in the outer shell
Mass Conservation of _______ means atoms are never created or lost
Exothermic A reaction that creates heat
Endothermic A reaction that requires heat or energy
Compound When two or more elements are chemically combined
Molecule Two or more atoms bonded together
Mixture Substances combined but not chemically
Solution A mixture with the same properties throughout
Subscript Little numbers like the “2” in the formula for water
Coefficient Big numbers like the “3” in 3CaO
Substance A single kind of matter with specific physical and chemical properties
Physical A property that can be tested without changing the substance
Chemical A property that cannot be tested without changing the substance
Created by: sLnelson