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ch 5 vocab jade Davi
chapter 5 vocabulary
| Question | Answer |
|---|---|
| Dmitri Mendeleev | Russian chemist who came up with the periodic table |
| *Lothar Myer | |
| Periodic law | the physical and chemical properties of the elements are periodic functions of their atomic numbers |
| Periodic table | an arrangement of elements in order of their atomic numbers so that elements with similar properties fall in the same column or group |
| Noble Gas | a group 18 elements(helium. neon. argon. krypton. xenon and radon) |
| Lanthanides | one of the 14 elements with atomic numbers from 58 to 71 |
| Actinides | one of the 14 elements with atom numbers from 90 through 103 |
| Periodicity | a pattern similar to atomic number found on the periodic table |
| Period | a horizontal row of elements in the periodic table |
| Family | a vertical column of the periodic table |
| Series | A series of compounds in which each member differs from the next by a specific number and kind of atoms |
| Group | a vertical column of the periodic table |
| s block elements | chemically reactive metals |
| p block elements | all the elements in groups 13 |
| d block metals | metals with typical metallic properties and are often refered to as transition elements |
| f block metals | wedged between the 3rd and 4th groups in the 6th and 7th period |
| Alkali metals | one of the elements of group 1 of the periodic table |
| Alkaline Earth metals | one of the elements of group 2 of the periodic table |
| metal | an element that is a good conductor of heat and electricity |
| transition metals | The three rows of elements in the middle of the periodic table |
| main | group or representative elements |
| halogens | one of the elements of group 17 of the periodic table |
| atomic radius | one half the distance between the nuclei of identical atoms that are bonded together |
| *bonding radius | |
| ionization energy | the energy required to remove one electron from a neutral atom of an element |
| electron affinity | the energy change that occurs when an electron is acquired by a neutral atom |
| valance electron | an electron that is available to be lost, gained or shared in the formation of chemical compounds |
| cation | a positive ion |
| antion | a negative ion |
| ion | an atom or group of bonded atoms that has a positive or negative charge |
| atomic mass unit | a unit of mass that is exactly 1/12 the mass of a carbon 12 atom, or 1.660 540x10 to the negative 27 kg |
| nonmetal | an element that is a poor conductor of heat and electricity |
| isotope | atoms of the same element that have different masses |
| shielding effect | radiation absorbing material that is used to decrease radiation exposure from nuclear reactors, especially gamma rays |
Created by:
mahalie.jade
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