Αποτελέσματα Αναζήτησης
chemical properties of group 13 and 14 elements; • explain anomalous behaviour of boron and carbon; • describe allotropic forms of carbon; • know the chemistry of some important compounds of boron, carbon and silicon; • list the important uses of group 13 and 14 elements and their compounds. THE p -BLOCK ELEMENTS
In Class XI, you have learnt that the p-block elements are placed in groups 13 to 18 of the periodic table. Their valence shell electronic configuration is ns2np1–6 (except He which has 1s2 configuration). The properties of p-block elements like that of others are greatly influenced by atomic sizes, ionisation enthalpy, electron
Modern Periodic Law: The physical and chemical properties of elements are the periodic functions of their atomic numbers. Types of Elements: s-, p-, d- and f- blocks. MAIN GROUP ELEMENTS/ REPRESENTATIVE ELEMENTS: The s- and p- block elements are called main group elements or representative elements.
Class 11 Chemistry. Chapter 11 – The p-block Elements . INTRODUCTION: ade up of elements in groups 13 through 18 of the periodic table. Metals, metalloids, and non-metals are all found in the p-block. The electrical configuration of the p-block comp. nents is .
The block of elements in the periodic table consisting of the main groups : Group 13 (B to Tl) Group14 (C to Pb) Group15 (N to Bi) . Group 16 (O to Po) Group17 (F to At) Group18 (He to Rn) Members at the top and on the right of the p-block are nonmetals (C, N, P, O, F, S, Cl, Br, I, At). .
Group 13 elements have their electronic configuration of ns2 np1 and the oxidation state exhibited by these elements should be 3. Apart from these two electrons boron and aluminium, other elements of this group exhibit both +1 and +3 oxidation states. Boron and aluminium show oxidation state of +3 due to the inert pair effect.
Answer Boron and thallium belong to group 13 of the periodic table. In this group, the +1 oxidation state becomes more stable on moving down the group. BCl3 is more stable than TlCl3 because the +3 oxidation state of B is more stable than the +3 oxidation state of Tl.
