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

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）的原子半径随原子序数的递增而减小；
（2）同一族的元素从上到下,随电子层数增多,原子半径增大.
1.2 元素化合价
（1）除第1周期外,同周期从左到右,元素最高正价由碱金属+1递增到+7,非金属元素负价由碳族-4递增到-1（氟无正价,氧无+6价,除外）；
（2）同一主族的元素的最高正价、负价均相同
1.3 单质的熔点
（1）同一周期元素随原子序数的递增,元素组成的金属单质的熔点递增,非金属单质的熔点递减；
（2）同一族元素从上到下,元素组成的金属单质的熔点递减,非金属单质的熔点递增
1.4 元素的金属性与非金属性
（1）同一周期的元素从左到右金属性递减,非金属性递增；
（2）同一主族元素从上到下金属性递增,非金属性递减.

1 periodic table of elements and their compound by law degeneration
1.1 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 same
1.3 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 elemental
1.4 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.