| A | B |
|---|
| Mass | amount of matter contained in a substance |
| volume | amount of space an object occupies |
| matter | has mass and volume |
| property | a characteristic of a substance that can be observed |
| physical property | a characteristic of a substance that can be observed without changing the identity of the substance |
| chemical property | a characteristic of a substance that can be observed ONLY when the identity of the substance is changed |
| element | A substance that cannot be broken down into simpler substances by ordinary chemical means. |
| specfic heat | the amount of energy needed to raise one gram of a substance by one degree Celsius |
| Solubility | the solubility to dissolve in another substance |
| ductility | the ability to be stretched into a thin wire |
| Malleability | the ability to be hammered into a sheet |
| chemical reaction | occurs when the original substance changes form into a new substance. Some clues to a chemical reaction may include bubbles, smoke, a strong smell, color change, temperature change, or a sizzling sound. |
| solution | when one substance mixes with another and dissolves. Example: Salt + Water = Salt Water |
| atom | The smallest unit of matter that retains the identity of the substance. |
| proton | subatomic particle with a positive charge and located in the nucleus of the atom. The number of protons gives the atom its identity. |
| neutron | subatomic particle with no charge, the same mass as a proton, and located in the nucleus of the atom. |
| electron | subatomic particle with a negative charge and located outside the nucleus |
| atomic number | the number of protons in the nucleus of an atom. This number identifies the atom. |
| Atomic mass | the average mass number of all isotopes of an atom. Round this number to find the mass number of the atom. |
| mass number | the number of protons and neutrons in the nucleus of an atom. Mass number = protons + neutrons |
