元素周期律元素周期表同步导学（Periodic law of elements, periodic table of elements, synchronous guidance）精选.doc

元素周期律元素周期表同步导学（Periodic law of elements, periodic table of elements, synchronous guidance） The periodic law of elements, the periodic table of elements, the simultaneous guidance of.Txt, if there is an afterlife, do a tree, stand eternal, no sad gesture. Half in the soil, quiet, half in the wind flying, half fall cool, half bathed in sunshine, very silent, very proud, never rely on never looking for. Column tree navigation Join the collection Sitemap Home The subject teaching curriculum teaching plan teaching reference thesis team preliminaries final results Aosai Gallery forum message resources course guiding classroom coaching example of extracurricular experiment to explore the basis of innovation of college entrance examination questions Zhenti special doubts solving prediction of junior middle school Your present position: Chemistry Instruction Station, course guidance, knowledge ability guidance, compulsory two, text Periodic elements of elements, periodic table synchronous tutorial, author: hxfdz article source: this site original hits: 211 update time: 2008-12-3 (I) periodic law of elements (1) with the increase of atomic number, the law of the change of the outer electron configuration of the nucleus is that the outermost electron number of the atom varies periodically from 1 to 2 or 8. (2) with the increase of atomic number, the law of atomic radius changes: the radius of atoms varies periodically from large to small. (3) as the atomic number increases, the main elements of valence variation: the highest valence element is from + 1 to + 7 (O, F exception), negative valence from scratch, from - 4 to - 1 periodic variation, 0. 1. Elements Periodic Law: the properties of elements change periodically with the increase of atomic number. The 2. essence: the periodic change of atomic structure determines the periodic change of element properties. (two) the structure of periodic table of elements The meaning and arrangement principle of 1. element periodic table L