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.