Click to find more info about each use or occurrence. Table 21.3 Selected Properties of the Group 1 Elements… As a result, Cs (melting point = 28.5°C) is one of only three metals (the others are Ga and Hg) that are liquids at body temperature (37°C). These elements are all much too active to exist in nature in their native state. . They include lithium, sodium and potassium, which all react vigorously with water to produce an alkaline solution. The densities of the Group 1 elements increase down the group (except for a downward fluctuation at potassium). . A brief introduction to flame tests for Group 1 (and other) metal ions. Group 1 elements are known as Alkali Metals. It is also used to make tritium, types of batteries (shown above), These are lightweight and are not as toxic as lead and cadmium batteries. Uses and Occurrences: How the element is (or was) used or where it is found. . . This trend is shown in the figure below: The metals in this series are relatively light— lithium, sodium, and potassium are less dense than water (less than 1 g cm -3 ). element unique chemistry. Go to inorganic chemistry menu . They are called s-block elements because their highest energy electrons appear in the s subshell. The uses are, when you put it in water and then dry it, it becomes helium. As a result, Cs (melting point = 28.5°C) is one of only three metals (the others are Ga and Hg) that are liquids at body temperature (37°C). An unusual trend in the group 1 elements is the smooth decrease in the melting and boiling points from Li to Cs. Progressing down group 1, the atomic radius increases due to the extra shell of electrons for each element. Group 1 This is one of the infographics I’ve been making as part of a classroom display. Some properties and reactions of the nitrates, carbonates, hydrogencarbonates and hydrides of the Group 1 elements - limited to what is required by various UK A level syllabuses. . Group 1 elements and uses: As a Element: Lithium has a lot of uses. Some Group 1 compounds . Because beryllium's chemistry is so different from the other group 2 elements, the term "alkaline earth" is usually restricted to Mg, Ca, Sr, Ba, Ra. An unusual trend in the group 1 elements is the smooth decrease in the melting and boiling points from Li to Cs. The Group 1 elements in the periodic table are known as the alkali metals. !Mg2+ has a similar charge density to Li+, so the two elements show some similar chemistry (e.g., tendency to form useful organometallic compounds). The alkali metals are the elements that make up Group 1 of the periodic table: lithium, sodium, potassium, rubidium, cesium, and francium. 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