As you move down a group in the periodic table the number of shells increases, which means that the outer electron is further from the nucleus. What do you think of the answers? Simply put, this means that out of all of the non-metal elements, Fluorine is the most Because of the general appearance of the other elements in its periodic table column, it is assumed that francium would appear as a highly reactive metal, if enough could be collected together to be viewed as a bulk solid or liquid. Explain why Francium is the most reactive Group 1 element in terms of its electronic structure. 7. Francium, however, is a laboratory-produced element and only minute quantities have been made, so for all practical purposes, the most reactive metal is cesium. Answer Save. This makes it easier to remove the electron and makes the atom more reactive. , Dr. Howard Fields Within the alkali metals family, reactivity increases with increasing atomic number. How can I relate the reactivity series to electronegativity and ionization energy? For the metals, this means the outermost electrons becomes farther away from the positively-charged nucleus. Rate! Cesium reacts explosively with water, though it is predicted francium would react even more vigorously. Potassium is in the most reactive group of elements, the alkali metals, but it's not the most reactive metal within the group. Why is Francium and Flourine the most reactive metal an non-metal? Francium. In group one in the periodic table, the elements at the top are less reactive than the elements at the bottom of the group. Why is gold unreactive when only one electron is in the outer shell? They are, on some lists. 0. Answer #1 | 01/03 2014 15:45 Fluorine is very reactive because it has seven valence electrons and all elements want to have eight valence electrons, except Hydrogen and Helium, so Fluorine reacts a lot. 5 years ago. The opposite is true of Francium. Therefore, for practical purposes, Cesium is often regarded as the most reactive metal. The optimal electron configuration of the 2P orbital contains 6 electrons, so since Fluorine is so close to ideal electron configuration, the electrons are held very tightly to the nucleus. Francium is part of a group of metals on the periodic table that are referred to as ‘alkali metals(1).’ In this group there are actually a number of different metals but as you start moving down the list from lithium to francium the number of electrons starts to increase. Fluorine has the highest electronegativity and the smallest atomic radius therefore it gains valence electrons the most easily. Cesium and francium are the most reactive and lithium is the least. The most reactive metals belong to the alkali metals element group. down and to the left (towards Francium) On the right hand side of the periodic table, reactivity increases as you go . Though it can be produced, less than 30 grams is believed to exist on the Earth at any single point in time(1). ( fr) .....! Though, there’s not been a lot of tests on this process yet. Prior to the discovery of francium, the element was predicted and given the name eka-cesium. Wikipedia reports that ionization energy of francium is … This makes Francium the most reactive, followed by cesium, rubidium, potassium, sodium and lithium. 0.0 0 votes 0 votes Rate! Because it is so reactive, however, it’s going to be difficult to understand what it can do and what could cause extreme reactions that it already has with any amount of water. Cesium reacts explosively with water. Of the first 101 elements in the periodic table, only francium is less stable, and all the astatine isotopes more stable than francium are in any case synthetic and do not occur in nature. 0 0. Bulk francium has never been viewed. Because the reactivity of alkali metals increases going down the group. francium. By using ThoughtCo, you accept our, Reactivity Series Definition in Chemistry, Periodic Table Study Guide - Introduction & History. Who wouldn’t? Francium and its isotopes decay quickly into astatine, radium, and rad… Reactivity is a measure of how likely a chemical species is to participate in a chemical reaction to form chemical bonds. It is so because of the increasing metallic nature down a group and decreasing metallic nature across a period. Electropositivity increases down groups and decreases along periods (from left to right) on the periodic table. Reactivity of Group 1 Elements Hydrogen is a very reactive gas, and the alkali metals are even more reactive. Potassium is in the most reactive group of elements, the alkali metals, but it's not the most reactive metal within the group. 7 years ago. What is the most reactive halogen? Fluorine is the most reactive nonmetal. Hydrogen is a very reactive gas, and the alkali metals are even more reactive. , Dr. Howard Fields, No Comment. Asked 1/31/2017 1:36:09 PM. So, as my colleague wrote, when you move upon the Periodic Table and you do it downward along the "Alkaline Metals GROUP I" you are meeting chemical elements more and more reactive since … An element that is highly electronegative, such as fluorine, has an extremely high attraction for bonding electrons. The most reactive metal in the periodic table is francium. Didn't see the "metal" in your question there. The least reactive metals are the platinum metals and wolfram - the most unreactive metal is gold (after Pauling); the bottom left metals (caesium, francium, barium, etc.) Francium is an alkaline metal, which means that its one electron is easily given away, making it highly reactive. Answer Save. The least reactive metals are the platinum metals and wolfram - the most unreactive metal is gold (after Pauling); the bottom left metals (caesium, francium, barium, etc.) It has a stable isotope of francium-223, which was initially referred to as actinium K and has a short half-life of just twenty-two minutes. Fluorine is very reactive because it has seven valence electrons and all elements want to have eight valence electrons, except Hydrogen and Helium, so Fluorine reacts a lot. On top of this it’s also extremely radioactive, which makes it dangerous to use for experimentation or other purposes. Francium (Fr), heaviest chemical element of Group 1 (Ia) in the periodic table, the alkali metal group. , Dr. Howard Fields, No Comment, January 1, 2018 Its physical and chemical properties are most similar to its heavier homologues strontium and barium. Answer for question: Your name: Answers. The reason for the strong exothermic reaction is because francium is an alkali metal. As a general rule, fluorine is the most reactive halogen and astatine is the least reactive. Join now. The most reactive metal on the left hand side of the periodic table is. Fluorine is the most electronegative element because it has 5 electrons in it's 2P shell. The least reactive elements are the noble gases. Of course, you’re going to want to know just what happens when you expose francium to water, right? This makes Francium the most reactive, followed by cesium, rubidium, potassium, sodium and lithium. Plutonium: A History of the World's Most Dangerous Element. 2 Answers. Which is the most reactive metal cesium or francium Ask for details Follow Report by Harshsharma100 03.02.2020 Log in to add a comment Answers Explanation: Francium. Francium, however, is a laboratory-produced element and only minute quantities have been made, so for all practical purposes, the most reactive metal is cesium. Because the atom is so large, there is a shielding effect between the protons in the nucleus, and the valence electron. The reason Fluorine is more reactive than all other elements with seven valence electrons is because it is the smallest. Down the group: atomic and ionic radii and density increase while melting and boiling points decrease. yumdrea|Points 36458| User: The time necessary for the decay of one-half sample of a radioactive substance is a _____. In group one in the periodic table, the elements at the top are less reactive than the elements at the bottom of the group. Francium is the most reactive metal on the periodic table. Updated 1/31/2017 10:01:43 PM . Francium, in group 1 of the periodic table.-Metal fluorine-non metal. 13. Francium ranks as the second most electropositive element, following cesium, and is also the second rarest naturally occurring element, after astatine. 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