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The Atom
| Term | Definition |
|---|---|
| Atom | The smallest unit of an element that maintains the properties of that element |
| Electorn | A subatomic particle that has a negative charge |
| nucleus | In physical science, an atom's central region, which is made up of protons and neutrons |
| proton | A subatomic particle that has a positive charge and that is located in the nucleus is the atomic number, which determines the identity of an element |
| neutron | A subatomic particle that has no charge and that is located in the nucleus of an atom |
| electron cloud | A region around the nucleus of an atom where electrons are likely to be found |
| Atomic number | The number of protons in the nucleus of an atom; the atomic number is the number is the same for all atoms of an element |
| Mass number | A measure of the amount of matter in an object |
| Periodic Table | An arrangement of the elements in order of their atomic numbers such that elements with similar properties fall in the same column, or group |
| Chemical Symbol | A one-two, or three-letter abbreviation of the name of an element |
| Average atomic mass | The weighted average of the masses of all naturally occurring isotopes of an element |
| metal | An element that is shiny and that conducts heat and electricity well |
| nonmetal | An element that conducts heat and electricity poorly |
| metalloid | An element that has properties of both metals and nonmetals |
| group | A vertical column of elements in the periodic table; elements in a group share chemical properties |
| period | In chemistry, a horizontal row of elements in the periodic table |
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18jones-naylorc1018
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