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P.S. vocab
periodic table vocabulary
| Question | Answer |
|---|---|
| the smallest unit of an element that maintains the properties of that element | atom |
| a subatomic particle that has a negative charge | electron |
| an atom's central region which is made up of protons and neutrons | nucleous |
| a region around the nucleous of an atom where electrons are likely to be found | electron cloud |
| a unit of mass that describes the mass of an atom or molecule | atomic mass unit |
| the number of protons in the nucleous of an atom; the same for all atoms of an element | atomic number |
| a subatomic particle that has a positive charge and that is located in the nucleus of an atom; the number of protons in the nucleus is the atomic number, which determines the identity of an elemen | proton |
| a subatomic particle that has no charge and that is found in the nucleus of an atom | neutron |
| an atom that has the same number of protons (or the same atomic number) as other atoms of the same element do but that has a different number of neutrons (and thus a different atomic mass) | isotapes |
| the sum of the numbers of protons and neutrons in the nucleus of an atom | mass number |
| the mass of an atom expressed in atomic mass units | atomic mass |
| describes something that occurs or repeats at regular intervals | periodic |
| the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements | period law |
| a vertical column of elements in the periodic table; elements in a group share chemical properties | group |
| in geology, a unit of geologic time that is longer than an epoch but shorter than an era | period |
| one of the elements of Group 1 of the periodic table (lithium, sodium, potassium, rubidium, cesium, and francium) | alkali metals |
| one of the elements of Group 2 of the periodic table (beryllium, magnesium, calcium, strontium, barium, and radium) | alkali earth metals |
| one of the elements of Group 17 of the periodic table (fluorine, chlorine, bromine, iodine, and astatine); halogens combine with most metals to form salts | halogens |
| one of the elements of Group 18 of the periodic table (helium, neon, argon, krypton, xenon, and radon); noble gases are unreactive | noble gases |
Created by:
annaepstein
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