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Periodic Table
| Question | Answer |
|---|---|
| the basic particle of which all elements are made; the smallest particle of an element that has the properties of that element. | atom |
| a tiny, negatively charged particle that moves around the outside of the nucleus of an atom. | electrons |
| the central core of an atom which contains protons and neutrons. | nucleus |
| small, positively charged particles that are found in the nucleus of an atom. | protons |
| a region of an atom electrons of the same energy are likely to be found. | energy level |
| a small particle in the nucleus of an atom, no electrical charge. | neutron |
| the number of protons in the nucleus in an atom. | atomic number |
| an atom with the same number of protons an a different number of neutrons form other atoms of the same element. | isotopes |
| the sum of protons and neutrons in the nucleus of an atom. | mass number |
| the number of protons in the nucleus of an atom. | atomic number |
| an arrangement of the elements showing the repeating pattern of their properties. | periodic table |
| a 1 or 2 letter representation of an element. | chemical symbol |
| a horizontal row of elements in the periodic table. | period |
| elements in the same vertical column of the periodic table; also called family. | group |
| a class of elements characterized by physical properties that include luster, malleability, ductility, and conductivity. | metal |
| the way a mineral reflects light from its surface. | luster |
| a term used to describe material that can be hammered or rolled into flat sheets. | malleable |
| a term used to describe a material that can be pulled out into a long wire. | ductile |
| the ability of an object tot transfer heat. | thermal conductivity |
| the ability of an object to carry electric current. | electrical conductivity |
| the ease and speed with which an element combines, or reacts, with other elements and compounds. | reactivity |
| the gradual wearing away of a metal element due to a chemical reaction. | corrosion |
| an element in group 1 in the periodic table. | alkali metal |
| an element in group 2 in the period table. | alkaline earth metal |
| one of the elements in groups 3-12 on the periodic table. | transition metal |
| an element that lacks most of the properties of a metal. | nonmetal |
| a molecule consisting of 2 atoms. | diatomic metal |
| an element found in group 17 on the periodic table. | halogen |
| an element in group 18 of the periodic table. | noble gasses |
| an element that has some characteristics of both metal and nonmetals. | metalloid |
| a substance that can conduct electric current under some conditions. | semiconductor |
| the process in which radioactive elements break down, releasing fast moving particles and energy. | radioactive decay |
| a reaction involving the particles in the nucleus of an atom that can change one element into another. | nuclear reaction |
| the spontaneous emission of radiation by ab unstable atomic nucleus. | radioactivity |
| a particle given off during radioactive decay tat consists of of 2 protons and 2 neutrons. | alpha particle |
| a fast moving electron that is given of as nuclear radiation. | beta particle |
| electromagnetic waves with the shortest wavelengths and highest frequencies. | gamma ray |
| the time it takes for half of the atoms of a radioactive element to decay. | half life |
| the process of determining the age of an object using half life of 1 or more radioactive isotopes. | radioactive dating |
| a radioactive isotope that can be followed through the steps of a chemical reaction or industrial process. | tracer |
Created by:
elcamino504
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