Trend in Reactivity of Group 7: Reactivity of group 7 non-metals increases as you go up. Each outer shell contains seven electrons and when group 7 metals react, they will need to gain one outer electron to get a full outer shell of electrons. Periodic Table - Group 7 Elements. Halogens - Group 7 Reactions and reactivity. F 2 , Cl 2 , Br 2 ) get stronger down the group. Author: Created by gerwynb. Descriptions and reactions of halogens or group 7 elements. This shows the fall in reactivity of the halogens as you go down Group 7. Preview. 6) potassium is in group a million because of the fact there is one electron interior the outer shell. There are multiple ways of grouping the elements, but they are commonly divided into metals, semimetals (metalloids), and nonmetals. Reactions with hydrogen. . Presentation, worksheet and practical for teaching halogens. Group 7 elements however have 7 electrons in their outermost shells, so they react by gaining an electron to form an outermost ring of 8 electrons. More reactions of halogens . However, the oxidising ability decreases down the Therefore, F2 is the most powerful oxidising agent while I2 is the weakest. Created: Nov 13, 2014. The electro positivity of the elements also reduces while moving down the reactivity series of metals. You'll find more specific groups, like transition metals, rare earths, alkali metals, alkaline earth, halogens, and noble gasses. Describes and explains the trend in oxidising ability of the Group 7 elements based on the reactions between one halogen and the ions of another one - for example, between Cl 2 and I-ions from salts like KI. As with group 1 and 2, the trends in properties and GENERAL reactivity in group 7 can be explained by their electronic configuration: The reason that melting and boiling points increase down the group is because the intermolecular forces between the halogen molecules (e.g. Because the halogens are highly reactive, none is found in nature as the free element. Includes a diagram of relative atomic sizes for groups 1, 7 and 8. In GCSE Chemistry students must have a good knowledge of the periodic table. sodium and potassium. The most reactive elementary group is alkali metals (situated far apart from intermediate metals and noble gases). 7) they have ful outer shells that's why they are so unreactive. Sections on group 1 (and 2) and group 7 (and 6). 12.12Reactions of Group VII Elements. Fluorine combines explosively with hydrogen even in the cold and dark to give hydrogen fluoride gas. 4.7 35 customer reviews. I have linked a video I made to help students with this task. Scaffolded worksheet on comparing the reactivity of 2 elements in the same group e.g. The incredible ibex defies gravity and climbs a dam | Forces of Nature with Brian Cox - BBC - … Reactivity of the elements in group 7 decreases down the group. ; This is reflected in their ability to oxidise other halide ions, as follow: Halogens are powerful oxidising agents. Chlorine and hydrogen explode if exposed to sunlight or a flame to give hydrogen chloride gas. This is because the electrons in the outer shell are further away from the nucleus. Halogens as oxidising agent. . To understand the periodic trends and reactivity of the group 17 elements: the halogens.