Reactivity trend across periodic table8/16/2023 ![]() c) the trend in reactivity of the halogens Cl₂, Br₂ and I₂, illustrated by reaction with other halide ions.c) the trend in reactivity in terms of the first and second ionisation energies of Group 2 elements down the group.b) the relative reactivities of the Group 2 elements Mg → Ba shown by their redox reactions with: oxygen, water, dilute acids.g) explanation of the variation in melting points across Periods 2 and 3 in terms of structure and bonding.cii) explanation of the trend in first ionisation energies across Periods 2 and 3, and down a group, in terms of attraction, nuclear charge and atomic radius.ci) first ionisation energy (removal of 1 mol of electrons from 1 mol of gaseous atoms) and successive ionisation energy.understand the following reactions: solid Group 1 halides with concentrated sulfuric acid, to illustrate the trend in reducing ability of the hydrogen halides understand the trend in reactivity of Group 7 elements in terms of the redox reactions of Cl₂, Br₂ and I₂ with halide ions in aqueous solution, followed by the addition of an organic solvent Topic 4B: The elements of Group 7 (halogens).understand reasons for the trend in reactivity of the Group 2 elements down the group Topic 4A: The elements of Groups 1 and 2.Topic 4: Inorganic Chemistry and the Periodic Table.be able to illustrate periodicity using data, including electronic configurations, atomic radii, melting and boiling temperatures and first ionisation energies ionisation energy based on given data or recall of the plots of ionisation energy versus atomic number understand reasons for the trends in the following properties of the elements from periods 2 and 3 of the Periodic Table: the melting and boiling temperatures of the elements, based on given data, in terms of structure and bonding the fact that successive ionisation energies provide evidence for the existence of quantum shells and the group to which the element belongs understand reasons for the general increase in first ionisation energy across a period be able to define the terms ‘first ionisation energy’ and ‘successive ionisation energies’ Topic 1: Atomic Structure and the Periodic Table.The trend in reducing ability of the halide ions, including the reactions of solid sodium halides with concentrated sulfuric acid.The trend in oxidising ability of the halogens down the group, including displacement reactions of halide ions in aqueous solution.The trends in electronegativity and boiling point of the halogens.The relative solubilities of the sulfates of the elements Mg–Ba in water.The relative solubilities of the hydroxides of the elements Mg–Ba in water. ![]()
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