Table of Contents
What is the anomalous behavior of boron?
1)Boron being small is harder than the other elements of its group. 2)It has higher melting and boiling point than those of the other members of its group. 3) Boron forms only covalent compounds while all other members form both ionic and covalent compounds.
Which of the following are correct reason for anomalous behavior of lithium?
(a, b) Anomalous behaviour of Li is due to its exceptionally small size and high polarizing power.
What is anomalous behaviour of beryllium?
Anomalous behaviour of beryllium Be differ from rest of member due to smaller atomic and ionic size and higher electro negativity. Be is a hard metal while others are soft and it is least metallic among all, due to higher electronegativity .
What is the anomalous behaviour of lithium?
Anomalous behaviour of lithium with respect to other alkali metals: The melting point and boiling point of lithium are higher that than other alkali metals. The hardness of lithium is higher than other metals. Lithium nitrate decomposes to form an oxide whereas other metals on heating give nitrites.
Why lithium and magnesium shows diagonal relationship?
The diagonally opposite elements possess almost similar electronegativities and therefore almost similar electropositive character. Hence, the main reason of diagonal relationship between lithium and magnesium electronegativity remains constant the same on moving diagonally. So, the correct answer is option C.
What is the anomalous Behaviour of lithium?
Which of the following is correct reason for anomalous behaviour of boron?
The explanation: Boron shows anomalous behaviour with the other members of the group because of the smallest size and the group, highest ionization energy, highest electronegativity in the group, absence of vacant d- orbital and the allotropy, while the other members do not show.
What is anomalous behaviour of lithium Class 11?
The anomalous behaviour of lithium is as follows: Lithium is harder than other metals of the respective group. It has higher Melting and boiling point than other metals. As the polarizing power decreases with the increasing size of the ions the other alkali metal ions usually form anhydrous salts.
What is the relationship between lithium and magnesium?
Diagonal relationship between Lithium and Magnesium Lithium shows a diagonal relationship with Magnesium. Due to its small size lithium differs from other alkali metals but resembles magnesium, as its size is closer to lithium. The diagonal relationship is formed due to the identical size of ions.
What is the anomalous behaviour of the group 13 element boron?
Boron ,the first member of group 13 elements, shows anomalous behaviour and differ from rest of the members of its family. The main reason for this difference are : 1) exceptionally small atomic and ionic size. 2) high ionization enthalpy.
The anomalous behaviour of Lithium is due to the following factors: i. The lithium atoms and lithium ions are of very small size. Due to its small size, lithium-ion has a high positive charge density, resulting in high polarising power. As a result, its compounds develop a partial covalent character.
What is the difference between Li and be and boron?
Like Li and Be, Boron – the first member of group 13 also shows anomalous behaviour due to extremely low size and high nuclear charge/size ratio, high electronegativity and non-availability of d electrons. The main point of differences are, (1) Boron is a typical non- metal whereas other members are metals.
What is the covalence of boron in aqueous medium?
Except for boron, the compounds of the elements of the boron family like tetrahedral [M (OH) 4] – and octahedral [M (H 2 O) 6] 3+ (where M denotes the member of boron family) exists in an aqueous medium. The maximum covalence of boron is 4 due to the absence of d orbitals.