Question | Answer |
Atom | The smallest unit of an element |
Element | A substance that cannot be broken down into simpler substances by chemical means |
Compound | Chemicals made from atoms of different elements joined by chemical bonds. |
Mixture | Combination of two or more pure substances in which each pure substance retains its individual chemical properties. Can be composed of solids, liquids, or gases. |
Physical Change | Change in a substance doesn't change what the substance is. |
Chemical Change | A new substance is formed and energy is either given off or absorbed. |
Exothermic | Chemical reaction that releases energy in the form of heat. |
Endothermic | Chemical reaction that absorbs heat energy from its surroundings. |
Density | Measurement that compares the amount of matter an object has to its volume. |
Mass | Used to refer to the amount of matter in any given object. |
Volume | The amount of space occupied by an object measured in three dimensions, expressed in cubic units. |
Density | If you take the amount of mass of an object and divide that by its volume, you have? |
Periodic Table | An arrangement of the chemical elements in rows and columns that are ordered by their atomic number. |
Metal | Can conduct electricity, has shiny luster, and malleable. |
Nonmetal | Has a dull luster and brittle. |
Metalloid | Can take on the properties of both metals and nonmetals. |
Brittle | Liable to break or shatter easily. |
Malleable | Able to be hammered or pressed permanently out of shape without breaking or cracking. |
Ductility | Hammered thin or stretched into wire without breaking. |
Matter | Something that occupies space. |
Matter | Solids, Liquids, Gases |