which alkali metal has the lowest melting point?
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The melting points of the alkali metals as a group are lower than those of any other nongaseous group of the periodic table, ranging between 179 °C (354 °F) for lithium and 28.5 °C (83.3 °F) for cesium. Among the metallic elements, only mercury has a lower melting point (−38.9 °C, or −38.02 °F) than cesium.
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Alkali metals are among the most reactive metals. This is due in part to their larger atomic radii and low ionization energies. They tend to donate their electrons in reactions and have an oxidation state of +1. These metals are characterized by their soft texture and silvery color.
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Cesium is an alkali metal, along with lithium, sodium, potassium, rubidium and francium. Alkali metals are highly reactive, have one electron in their outer shell, and do not occur freely in nature, according to ChemicalElements. ... Cesium is incredibly accurate at timekeeping and is used in atomic clocks.
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The alkali metals are solids at room temperature (except for hydrogen), but have fairly low melting points: lithium melts at 181ºC, sodium at 98ºC, potassium at 63ºC, rubidium at 39ºC, and cesium at 28ºC. They are also relatively soft metals: sodium and potassium can be cut with a butter knife.
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The science The alkali metals are the elements Lithium, Sodium, Potassium, Rubidium, Caesium and Francium. They are grouped together because they all behave similarly (except with different ferocity) and together form Group 1 of the Periodic Table. ... Lithium is used to make rechargeable batteries and lightweight alloys.
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Both group form ionic compound but only Halogens for covalent bonds. THe Alkali metals have low densities while the Halogens have high densities and the melting point and boiling point patterns are opposite for the Halogens it increases whereas for the Alkali metals it decreases.
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Like other elements in the first row, potassium is a member of the alkali group with sodium and cesium. All of the members of the alkali group have an outer shell with only one electron in orbit. Because there is only one electron, the element is very reactive and searches out other elements to make new compounds.
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The alkali metals belong to group 1 which means that they have 1 valence electron so they posses very less amount of nuclear charge i.e attraction between nucleus(+ve) to the outermost electron is very less so they have large atomic size.
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The chemical element with the lowest melting point is Helium and the element with the highest melting point is Carbon.
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Sodium. Chemical element, symbol: Na, atomic number: 11 and atomic weight 22,9898. It's a soft metal, reactive and with a low melting point, with a relative density of 0,97 at 20ºC (68ºF). From the commercial point of view, sodium is the most important of all the alkaline metals.
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Physical properties Lithium is a very soft, silvery metal. It has a melting point of 180.54°C (356.97°F) and a boiling point of about 1,335°C (2,435°F). Its density is 0.534 grams per cubic centimeter. By comparison, the density of water is 1.000 grams per cubic centimeter.
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you can see that alkali metal have only one electron in outer shell . hence they have more tendency to loss this electron and form stable ion . ... due to low ionization enthalpy , and incomplete octet , alkali metals show good conductor of electricity .
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Cesium (symbol Cs and atomic number 55), a soft metal that violently reacts with water, melts at 301.59 K. The low melting point and softness of francium and cesium are a consequence of the size of their atoms. In fact, cesium atoms are larger than those of any other element.
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Alkali metals are the first group in the periodic table. They are never found in nature uncombined because they are unstable and they react fast to other elements. They bond well with all elements except the noble gases.
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['shiny.', 'silvery-white.', 'somewhat reactive metals at standard temperature and pressure.', 'readily lose their two outermost electrons to form cations with a 2+ charge.', 'low densities.', 'low melting points.', 'low boiling points.']
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Physical properties Potassium is a soft, silvery-white metal with a melting point of 63°C (145°F) and a boiling point of 770°C (1,420°F). Its density is 0.862 grams per cubic centimeter, less than that of water (1.00 grams per cubic centimeter). That means that potassium metal can float on water.
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Answer: Mercury To understand why mercury has such an incredibly low melting point that it remains liquid at room temperature (and even in the depths of winter nearly everywhere but extreme winter climates like the Arctic Circle) we need to approach it from an atomic level.