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Definition
| A positively charged particle located in an atom's nucleus. |
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Definition
| A particle that has no electric charge and is located in an atom's nucleus. |
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| The central region of an atom where most of the atom's mass is found in protons and neutrons. |
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| A negatively charged particle located outside an atom's nucleus. |
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Definition
| The number of protons in the nucleus of an atom. |
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Definition
| The total number of protons and neutrons in an atom's nucleus. |
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Definition
| An atom on one element that has a different number of neutrons than another atom of the same element. |
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| An atom or group of atoms that has a positive or negative electric charge. |
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Definition
| The average mass of the atoms of an element. |
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Definition
| A table of the elements, arranged by atomic number, that shows the patterns in their properties. |
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| A vertical column in the periodic table of the elements. |
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Definition
| A horizontal row in the periodic table of the elements. |
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Definition
| Likely to undergo chemical change. |
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Definition
| An element that tends to be shiny, easily shaped, and a good conductor of electricity and heat. |
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Definition
| An element that is not a metal and has properties generally opposite to those of a metal. |
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Definition
| An element that has properties of both metals and nonmetals. |
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Definition
| The process by which the nucleus of an atom of an element releases energy and particles. |
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Definition
| The amount of time it takes for half of the nuclei of a radioactive isotope to decay into atoms of another element. |
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