英语翻译1 元素周期表中元素及其化合物的递变性规律 1.1 原子半径 （1）除第1周期外,其他周期元素（惰性气体元素除外

1 periodic table of elements and their compound by law degeneration1。1 Atomic radius(1) Subject to paragraph 1 cycle,the other cycle elements (except for the inert gas elements) of the atomic radius decreases with increasing atomic number;(2) the elements of the same family from top to bottom,with electronic layers increased,atomic radius increases。Valence of 1。2 elements(1) In addition to a cycle,with the cycle from left to right,elements of the highest-price increase by the alkali metal +1 to +7,non-metallic elements in the negative price increment by the carbon group -4 to -1 (F has no positive value,oxygen-free +6 price excluded);(2) the same main group elements in the highest positive value,negative prices are the same1。3 the melting point of a single quality(1) the same cycle of elements with increasing atomic number,elemental metal elements increase the melting point,melting point of diminishing non-metallic simple substance;(2) from top to bottom with the family element,the element composition of the metal decreases the melting point of a single mass,increasing the melting point of non-metallic elemental1。4 Elements of metallic and nonmetallic(1) the elements of the same period decreased from left to right metallic,non-metallic nature of increments;(2) the same metallic main group elements increase from top to bottom,non-metallic nature of decline。