click below
click below
Normal Size Small Size show me how
SCI8-Chemistry
Properties of Matter (EPISD 8th grade)
Question | Answer |
---|---|
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 |