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Details Title: Periodic Law Key Terms Description: Chapter 5 Key Terms Total Flash Cards: 18 Created: 03/17/2004 06:21:23	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term actinide Definition The 14 elements with atomic numbers from 90 (thorium, Th) to 103 (lawrencium, Lr) Term lanthanide Definition the 14 elements with atomic numbers from 58 (cerium, ce) to 71 (lutetium, Lu) Term periodic law Definition The physical and chemical properties of the elements are periodic functions of their atomic numbers Term periodic table Definition an arrangement of the elements in order of their atomic numbers so that elements with simliar properties fall in the same column, or group Term alkali metals Definition The elements of Group 1 of the periodic table (lithium, sodium, potassium, rbuidium, cesium, and francium) Term alkaline-earth metals Definition The elements of Group 2 of the periodic table (beryllium, magnesium, calcium, strontium, barium, and radium) Term transition elements Definition The d-block elements are metals with typical metallic properties Term main-group elements Definition The p-block elements together together with the s-block elements Term halogens Definition The elements of Group 17 (fluroine, chlorine, bromine, iodine, and astatine) Term atomic radius Definition One-half the distance between the nuclei of identical atoms that are bonded together Term ion Definition atom or group of bonded atoms that has a positive or negative charge Term ionization Definition Any process that results in the formation of an ion Term ionization energy, IE Definition The energy required to remove one electron from a neutral atom of an element Term electron affinity Definition The energy change that occurs when an electron is acquired by a neutral atom Term cation Definition A positive ion Term anion Definition A negative ion Term valence electrons Definition The electrons available to be lost, gained, or shared in the formation of chemical compounds Term electronegativity Definition a measure of the ability of an atom in a chemical compound to attract electrons