Answer the following questions
1) What are orho and pyro silicates?
2) Graphite is conductor and diamond is insulator ?
3) What is borazene? Give it's preparation and why it is called as organic benzene?
1) What are orho and pyro silicates?
2) Graphite is conductor and diamond is insulator ?
3) What is borazene? Give it's preparation and why it is called as organic benzene?
1) Sorosilicate, formerly called Pyrosilicate, any member of a group of compounds with structures that have two silicate tetrahedrons (a central silicon atom surrounded by four oxygen atoms at the corners of a tetrahedron) linked together. Because one oxygen atom is shared by two tetrahedrons, the chemical formula contains Si2O7, as in meliliteor hemimorphite.
2) Both are carbon variants. The difference in conductivity is due to the molecular structure of both solids. Recall that carbon has an atomic number of 6, thus 2 electrons are in the first electron layer, and 4 atoms in the outer layer; to form a stable electronic bonding, each carbon atom should get 4 electrons from neighbor atoms. Diamond: each carbon atom has a covalent bond with four other carbon atoms in a tetrahedral arrangement to form a rigid structure. This is a stable arrangement where the outer electron layer of all atoms are filled with 8 electrons; so, there are no free electrons to move and create electric current. Thus diamond is an insulator/dielectric.
Graphite: covalent structure, with each carbon bonded to three other carbon atoms in a hexagonal arrangement. Three out of four valence electrons are used for covalent bonding with other carbon atoms. Remaining valence electron can easily (with low energy) be moved across the planes of carbon atoms, making it easy to pass an electric current. Thus, graphite is a good conductor.
Borazine is an inorganic compound with the chemical formula (BH)3(NH)3. In this cyclic compound, the three BH units and three NH units alternate. The compound is isoelectronic and isostructural with benzene. Like benzene, borazine is a colourless liquid.[2]For this reason borazine is sometimes referred to as "inorganic benzene".
2) Both are carbon variants. The difference in conductivity is due to the molecular structure of both solids. Recall that carbon has an atomic number of 6, thus 2 electrons are in the first electron layer, and 4 atoms in the outer layer; to form a stable electronic bonding, each carbon atom should get 4 electrons from neighbor atoms.
Diamond: each carbon atom has a covalent bond with four other carbon atoms in a tetrahedral arrangement to form a rigid structure. This is a stable arrangement where the outer electron layer of all atoms are filled with 8 electrons; so, there are no free electrons to move and create electric current. Thus diamond is an insulator/dielectric.
Graphite: covalent structure, with each carbon bonded to three other carbon atoms in a hexagonal arrangement. Three out of four valence electrons are used for covalent bonding with other carbon atoms. Remaining valence electron can easily (with low energy) be moved across the planes of carbon atoms, making it easy to pass an electric current. Thus, graphite is a good conductor.
Borazine is an inorganic compound with the chemical formula (BH)3(NH)3. In this cyclic compound, the three BH units and three NH units alternate. The compound is isoelectronic and isostructural with benzene. Like benzene, borazine is a colourless liquid.[2]For this reason borazine is sometimes referred to as "inorganic benzene".
