Class 12

Oxides of Nitrogen – The p-Block Elements – Class 12 Oxides of Nitrogen     Nitrogen combines with oxygen under different conditions to form a number of binary oxides which differ with respect to the oxidation state of the nitrogen atom. They range from N2O (oxidation state of N +1) through NO (+2), N2O3 (+3), N2O4 (+4) to N2O5(5). The tendency to form pπ- pπ multiple … [Read more...] about Oxides of Nitrogen

Dinitrogen and Ammonia - The p-Block Elements - Class 12 Dinitrogen 1) It is the first member of group 15 of the periodic table.  2) It has the electronic configuration 1s2 2s2 2p3 and therefore, has five electrons in its valence shell. 3) In the molecular form it exists as a diatomic molecule (N2) having triple bond between nitrogen atoms (NΞN). Therefore, it is also … [Read more...] about Dinitrogen and Ammonia

Chemical Properties of Group 15 Elements – The p-Block Elements – Class 12 Chemical Properties of Group 15 Elements   Nitrogen differs from rest of members of the group due to its  (1) smaller size, (2) high electronegativity, (3) high ionisation enthalpy and  (iv) non-availability of d-orbitals in the valence shell.   Nitrogen has unique tendency to form pπ-pπ … [Read more...] about Chemical Properties of Group 15 Elements

Representative Elements or the Main Group Elements In the long form of the periodic table, the elements have been classified into four blocks : s, p, d and f depending upon the subshell in which the last electron enters.   The elements belonging to s and p-blocks in the periodic table are called representative elements or the main group elements. They belong to groups 1, 2 … [Read more...] about Characteristics and Physical Properties of Group 15 Elements