chapter 5 vocabulary
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| Dmitri Mendeleev | Russian chemist who came up with the periodic table
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| *Lothar Myer |
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| Periodic law | the physical and chemical properties of the elements are periodic functions of their atomic numbers
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| 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
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| Noble Gas | a group 18 elements(helium. neon. argon. krypton. xenon and radon)
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| Lanthanides | one of the 14 elements with atomic numbers from 58 to 71
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| Actinides | one of the 14 elements with atom numbers from 90 through 103
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| Periodicity | a pattern similar to atomic number found on the periodic table
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| Period | a horizontal row of elements in the periodic table
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| Family | a vertical column of the periodic table
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| Series | A series of compounds in which each member differs from the next by a specific number and kind of atoms
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| Group | a vertical column of the periodic table
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| s block elements | chemically reactive metals
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| p block elements | all the elements in groups 13
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| d block metals | metals with typical metallic properties and are often refered to as transition elements
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| f block metals | wedged between the 3rd and 4th groups in the 6th and 7th period
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| Alkali metals | one of the elements of group 1 of the periodic table
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| Alkaline Earth metals | one of the elements of group 2 of the periodic table
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| metal | an element that is a good conductor of heat and electricity
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| transition metals | The three rows of elements in the middle of the periodic table
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| main | group or representative elements
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| halogens | one of the elements of group 17 of the periodic table
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| atomic radius | one half the distance between the nuclei of identical atoms that are bonded together
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| *bonding radius |
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| ionization energy | the energy required to remove one electron from a neutral atom of an element
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| electron affinity | the energy change that occurs when an electron is acquired by a neutral atom
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| valance electron | an electron that is available to be lost, gained or shared in the formation of chemical compounds
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| cation | a positive ion
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| antion | a negative ion
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| ion | an atom or group of bonded atoms that has a positive or negative charge
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| 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
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| nonmetal | an element that is a poor conductor of heat and electricity
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| isotope | atoms of the same element that have different masses
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| shielding effect | radiation absorbing material that is used to decrease radiation exposure from nuclear reactors, especially gamma rays
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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