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| The basic particle from which every element is made. |
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| A negatively charged particle found outside the nucleus of an atom. |
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Definition
| The central core of an atom |
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| A positively charged particle that is part of an atom’s nucleus. |
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Definition
| The specific amount of energy an electron has. |
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Definition
| - A small particle in the neutron of an atom, that has no electrical charge. |
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| - the number of protons in the nucleus of an atom. |
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| An atom with the same amount of protons but different amount of neutrons from other atoms in the same element. |
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Definition
| The sum of protons and neutrons in the nucleus of an atom. |
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Definition
| The average mass of all the isotopes of an element. |
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Definition
| A chart of elements showing the repeating pattern of their properties. |
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| A horizontal row of elements in the periodic table. |
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Definition
| Elements in the same vertical column of the periodic table; also called a family. |
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Definition
| A one or two-letter representation of an element. |
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Definition
| A gas like state of matter consisting of a mixture of free electrons and atoms that are stripped of their electrons. |
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Definition
| A nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy. |
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Definition
| A nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy |
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