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Definition
| Smallest particle of an element |
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Definition
| A pure substance that contains only one kind of atom |
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Definition
| The positive found in the nucleus of an atom. |
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Definition
| A particle found in th nucleus of an atom that has no charge. |
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Definition
| The negativley charged particle found in an atom |
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Definition
| The small, dense, central, core of an atom |
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Definition
| Orbits found outside the nucleus of an tom in which electrons travel |
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Definition
| The number of protrons in the nucleus of an atom |
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Definition
| The total number of protrons and neutrons in the nucleus of an atom; it is found by rounding off the atomic mass to the nearest whole number. |
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Definition
| The sum of the relative masses of the protons neutrons in an atom |
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Definition
| Atoms of the same element that have a different number of neutrons |
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Definition
| An atom of group of atom that have an electic charge as the result of losing or gaining electrons |
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Definition
| The organization of elements by atomic number into a table: similiar elements are grouped in horizontal rows (periods0 and vertical columns (groups) |
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Definition
| A horizontal (<------>) row of elements in the periodic table; 7 rows=7 periods |
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Definition
| Sets of elements arranged in vertical colomns in the priodic table; 18 groups; groups are often cld families |
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Definition
| Elements that tend to LOSE electrons easily; they are located on the left of the staircase on the periodic table |
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Term
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Definition
| Elements that ted to GAIN electrons easily; they are located on the right of the staircase on the periodic table |
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Term
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Definition
| Sunstances that exhibit some, but not all, of the properties of metals |
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