Physical And Chemical Properties Of Group 1 Elements Pdf
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This page discusses the trends in some atomic and physical properties of the Group 1 elements - lithium, sodium, potassium, rubidium and cesium. Sections below cover the trends in atomic radius, first ionization energy, electronegativity, melting and boiling points, and density.
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Alkali metals are chemical elements from the s-block of the periodic table. They have homologous physical and chemical properties. The alkali metals are a group of chemical elements in the periodic table with the following physical and chemical properties:. They can all be cut easily with a plastic knife due to their softness, and their shiny surface tarnishes rapidly in air due to oxidation. Because of their high reactivity, alkali metals must be stored under oil to prevent reaction with air. In the modern IUPAC nomenclature, the alkali metals comprise the group 1 elements, excluding hydrogen.
General introduction to the Group 1 Alkali Metals. What are the important trends down Group 1 Alkali Metals. Selected data on the Group 1 Alkali Metals. Explaining the alkali metal reactivity trend. The Reaction of Alkali Metals with Non—metals. Some compounds of the alkali metals - formula patterns.
Alkali metal , any of the six chemical elements that make up Group 1 Ia of the periodic table —namely, lithium Li , sodium Na , potassium K , rubidium Rb , cesium Cs , and francium Fr. The alkali metals are so called because reaction with water forms alkalies i. Sodium and potassium are the sixth and seventh most abundant of the elements, constituting , respectively, 2. The other alkali metals are considerably more rare, with rubidium, lithium, and cesium, respectively, forming 0. Francium, a natural radioactive isotope , is very rare and was not discovered until The alkali metals are six chemical elements in Group 1, the leftmost column in the periodic table. Like the other elements in Group 1, hydrogen H has one electron in its outermost shell, but it is not classed as an alkali metal since it is not a metal but a gas at room temperature.
Group 1: Properties of Alkali Metals
The alkali metals consist of the chemical elements lithium Li , sodium Na , potassium K , [note 1] rubidium Rb , caesium Cs , [note 2] and francium Fr. Together with hydrogen they constitute group 1 , [note 3] which lies in the s-block of the periodic table. All alkali metals have their outermost electron in an s-orbital : this shared electron configuration results in their having very similar characteristic properties. This family of elements is also known as the lithium family after its leading element. They can all be cut easily with a knife due to their softness, exposing a shiny surface that tarnishes rapidly in air due to oxidation by atmospheric moisture and oxygen and in the case of lithium, nitrogen. Because of their high reactivity, they must be stored under oil to prevent reaction with air, and are found naturally only in salts and never as the free elements.
General physical properties of Group 1 elements: Alkali metals are grey solids with shiny silvery surfaces when freshly cut. These surfaces turn dull when exposed to air. This is because alkali metals are very reactive. They react rapidly with oxygen and water vapour in the air when exposed.
Chemical and Biochemical Properties : As all other alkali metals, potassium is highly reactive compared to metals from other groups. A pure metal is usually obtained by electrolysis of its salts. In fact, potassium was the first metal to be obtained by electrolysis. It can be easily oxidized because the first ionization energy of the metal is so low; thus it is mostly found as an ion.
Remember Me. The alkali metals make up Group 1 of the periodic table. This family consists of the elements lithium, sodium, potassium, rubidium, cesium, and francium Li, Na, K, Rb, Cs, and Fr, respectively. Group one elements share common characteristics. They are all soft, silver metals.
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