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Week 7 – Properties of Matter |
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| 1) Atomic Number | The number of protons in the nucleus of an atom. Also the number that places them in order on the periodic table. |
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2) Atomic Mass |
The sum of the protons and neutrons in the nucleus of each atom. (similar to weight) |
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3) Energy Levels |
The possible locations around an atom where electrons having specific energy values may be found. The more energy they have the farther from the nucleus they will be. |
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4) Characteristic/Property |
A quality of a substance that never changes and can be used to identify the substance |
| 5) Chemical Symbol | A one or two letter code that stands or the name of an element. |
| 6) Solid | Matter that has a definite shape and volume, such as a rock. |
| 7) Liquid | Matter that can flow and change its shape. When poured into a container, it takes the shape of the container, but it’s volume stays the same. (definite volume, no definite shape) |
| 8) Gas | Matter with no special shape or size. It takes up the size and shape of any container that holds it. (No definite volume, no definite shape) |
| 9) Ion | an atom or molecule with a net electric charge due to the loss or gain of one or more electrons. |
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10) Isotope |
Atoms of the same element with different numbers of neutrons in the nucleus, thus different atomic masses. ( ex: Carbon-12 and Carbon -14) |