Advertisements
Advertisements
प्रश्न
Elements forming ionic compounds attain noble gas electronic configuration by either gaining or losing electrons from their valence shells. Explain giving reason why carbon cannot attain such a configuration in this manner to form its compounds. Name the type of bonds formed in ionic compounds and in the compounds formed by carbon. Also explain the reason why carbon compounds are generally poor conductors of electricity.
उत्तर
The atomic number of carbon is 6. This means that it has 4 electrons in its outermost shell and it needs 4 more electrons to attain noble gas electronic configuration. It cannot form C4+ cation, as the removal of 4 valence electrons requires a huge amount of energy. Moreover, the cation formed will have 6 protons and 2 electrons which makes carbon highly unstable. Carbon cannot form C4− anion, as its nucleus with 6 protons cannot hold 10 electrons. Thus, carbon achieves noble gas electronic configuration by sharing its 4 electrons with other elements; it forms covalent compounds.
In ionic compounds, ionic bonds are formed, while in carbon compounds, covalent bonds are formed.
As carbon compounds are covalent in nature and lack free electrons so they are bad conductors of electricity.
APPEARS IN
संबंधित प्रश्न
State the reason why carbon can neither form \[\ce{C^4+}\] cations nor \[\ce{C^4−}\] anions but forms covalent compound.
State the reason to explain why covalent compounds "are bad conductors of electricity".
Explain the bonding in methane molecule using electron dot structure.
Name the following:
The property of element by virtue of which atoms of the element can link to each other in the form of a long chain or ring structure.
Fill in the blank in the following sentence:
In forming N2 molecule, .............. electrons are shared by each atom of nitrogen.
What type of chemical bonds are formed by carbon? Why?
What type of bond is present in oxygen molecule?
How buckminsterfullerene is it related to diamond and graphite?
Describe the structure of diamond. Draw a simple diagram to show the arrangement of carbon atoms in diamond.
What happens when methane (natural gas) burns in air? Write the chemical equation of the reaction involved.
Explain the following term with example.
Covalent bond
Explain the following term with example.
Unsaturated hydrocarbon
Electrons are getting added to an element Y:
Is Y getting oxidised or reduced?
Acids dissolve in water and produce positively charged ions. Draw the structure of these positive ions.
Draw the electron dot diagram and structure of :
methane
Name the anion present in the following compound:
When a barium chloride solution is added to a solution of compound B, a white precipitate insoluble in dilute hydrochloric acid is formed.
Number of valence electrons in a carbon atom is _______.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc} \phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\ \phantom{..}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C- C- H}\\ \phantom{.}|\phantom{....}|\phantom{....}|\\ \ce{H - C - H}\\ |\\\ce{H}\end{array}\] |
Consider the coordination compound, K2[Cu(CN)4]. A coordinate covalent bond exists between:
What is a covalent bond?
