Diagonal Relationship Of Lithium And Magnesium | Chemistry, Class 11, s-Block Elements
The properties of lithium are quite different from the properties of other alkali metals. it shows greater resemblance with magnesium, which is diagonally opposite the anomalous behaviour of lithium as compared to other alkali metals are (i) T. properties of lithium with magnesium is that these two elements have almost. ANOMALOUS BEHAVIOR OF Li AND DIAGONAL RELATIONSHIP WITH Mg: Consequently the Li+ ion has remarkable great tendency towards solvation and convalent bond Lithium is much harder and lighter than the other alkali metals. Both Li and Mg are harder and higher salonjardin.info than the other metals of their groups. Live Online Tutor Help for Diagonal Relationship of Lithium With Magnesium We, at Transtutors have a team of highly-qualified and experienced chemistry.
It is interesting to not that in spite of their different valencies, the type and strength of the bonds formed; and properties of their compounds are often very similar. Thus lithium resembles more with its diagonally placed element magnesium than with the other members of its own group. The important properties in which lithium resembles magnesium and thus differs from the other alkali metals are summarized below. Lithium is much harder and lighter than the other alkali metals.
The hardness of lithium is comparable to that of magnesium. Its melting and boiling points are higher than those of the other alkali metals. It can be melted in dry air without its brilliance. The boiling point of lithium K is comparable to that of magnesium K.
Due to its high ionisation energy, it is the least reactive of all alkali metals towards the various reagents, except nitrogen. Magnesium is also stable in dry air.
Magnesium also reacts slowly with liquid bromine. Like lithium hydride, magnesium hydride, MgH2 is fairly stable. Lithium, is the only alkali metal which reacts with nitrogen and silicone to give lithium nitride.
Li3N and lithium silicide respectively. Magnesium also combines readily with nitrogen forming magnesium nitride. Lithium and magnesium ions show a tendency to form complexes with ammonia and water to form hydrates and also form a large number of organometallic compounds. Lithium and magnesium oxides dissolve in water quietly while the oxides of other alkali metals dissolve in water more energetically.
Lithium hydroxide is much less soluble and is a much weaker base than the hydroxides of other alkali metal. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. February Learn how and when to remove this template message A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods first 20 elements of the periodic table.
Diagonal Relationship Li And Mg Assignment Help
The organization of elements on the periodic table in to horizontal rows and vertical columns makes certain relationships more apparent periodic law. Moving rightward and descending the periodic table have opposite effects on atomic radii of isolated atoms. Moving rightward across the period decreases the atomic radii of atoms, while moving down the group will increase the atomic radii .
Similarly, on moving rightward a period, the elements become progressively more covalent [ clarification needed ], less basic and more electronegativewhereas on moving down a group the elements become more ionicmore basic and less electronegative. Thus, on both descending a period and crossing a group by one element, the changes "cancel" each other out, and elements with similar properties which have similar chemistry are often found — the atomic size[ clarification needed ], electronegativity, properties of compounds and so forth of the diagonal members are similar.
It is found that the chemistry of a first-group second period element often has similarities to the chemistry of the second- group third period element being one column to the right of it in the periodic table.
Diagonal relationship - Wikipedia
Thus, the chemistry of Li has similarities to that of Mg, the chemistry of Be has similarities to that of Al, and the chemistry of B has similarities to that of Si. These are called diagonal relationships. It is not as noticeable after B and Si.