Периодическую систему элементов ученые развивали более ста лет назад для удобства сопоставления свойств элементов. <...> На основании изучения кристаллической структуры твердых тел была описана природа химической связи, благодаря чему получила дальнейшее развитие теория металлов, которая стала инструментом не только для химиков и физиков, но и для металлургов. <...> In this respect the Periodic Law, which is the basis of the Periodic Table, represents FULL USE OF THE PERIODIC TABLE Ғылымның дамуымен қатар Периодтық заң жаңа мүмкіндіктерге ие болуда. <...> The Periodic Table was developed by chemists more than one hundred years ago as a correlation for the properties of the elements. <...> Numbering the groups in the Periodic Table has been abandoned and descriptive names have been given instead. <...> Түйінді сөздер: металдар, металл еместер, металлоидтар, типтік металдар, типті емес металдар, ауыспалы металдар, лантаноидтар, актиноидтар. <...> Key words: metals, nonmetals, metalloids, typical metals, less-typical metals, transition metals, inner transition metals, lanthanides, actinides. <...> Metals are the most common articles in everyday life; they are usually used in form of alloys, which are a combination of two or more metals. <...> Nonmetals, except carbon, are hardly used by an average person. <...> Air, a mixture of nonmetals is known to exist but is not seen by people. <...> Metalloids are the basis of advanced technology and the electronics industry (pic. 1). <...> Nonmetals include the inert gases1 , hydrogen, oxygen, nitrogen, fluorine, and chlorine, liquid bromine, and the solid elements carbon, sulfur, phosphorus, and iodine. <...> These elements do not have the properties of a metal. <...> Nonmetals except the inert gases readily share electrons. <...> Their atoms are united together by covalent bond, i. e., atoms that share their outer electrons. <...> Metalloids have covalent bond like nonmetals, , Cl2 , N2 or larger molecules such as P4 but have intermediate properties between metals and nonmetals. <...> Table 1 summarizes the properties of metals, nonmetals, and metalloids. <...> CLASSIFICATION OF METALS Since metals are those elements capable of losing electrons, therefore, they can be <...>