Advertisements
Advertisements
Question
Using electron-dot diagrams which show only the outermost shell electrons, show how a molecule of oxygen, O2, is formed from two oxygen atoms. What name is given to this type of bonding? (At. No. of oxygen = 8)
Advertisements
Solution
The atomic number of oxygen is 8. Its electronic configuration is 2, 6. Hence it has six electrons in its outermost shell.
In an oxygen molecule, one oxygen atom shares its two electrons with another oxygen atom. Hence this type of bonding is called covalent bonding.
APPEARS IN
RELATED QUESTIONS
What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur? (Hint – the eight atoms of sulphur are joined together in the form of a ring.)
Choose the most appropriate answer from the following list of oxides which fit the description.
A covalent oxide of a metalloid.
What type of bonds are present in water molecule? Draw the electron-dot structure of water (H2O).
What type of bonds are present in methane (CH4) and sodium chloride (NaCl)?
What type of bond is present in oxygen molecule?
Explain the formation of a chlorine molecule on the basis of electronic theory of valency.
Which inert gas does the H atom in HCl resemble in electron arrangement?
State one use of diamond which depends on its 'extraordinary brilliance' and one use of graphite which depends on its being 'black and quite soft'.
Buckminsterfullerene is an allotropic form of the element:
(a) phoshorus
(b) fluorine
(c) carbon
(d) sulphur
Two non-metals combine with each other by the sharing of electrons to form a compound X.
(a) What type of chemical bond is present in X?
(b) State whether X will have a high melting point or low melting point.
(c) Will it be a good conductor of electricity or not?
(d) Will it dissolve in an organic solvent or not?
An element E exists in three allotropic forms A, B and C. In allotrope A, the atoms of element E are joined to form spherical molecules. In allotrope B, each atom of element E is surrounded by three other E atoms to form a sheet like structure. In allotrope C, each atom of element E is surrounded by four other E atoms to form a rigid structure.
(a) Name the element E.
(b) What is allotrope A.
(c) What is allotrope B?
(d) What is allotrope C?
(e) Which allotrope is used in making jewellery?
(f) Which allotrope is used in making anode of a dry cell?
Explain the Structural isomerism term with example.
Explain the following term with example.
Hetero atom in a carbon compound
Draw electron - dot structure and structural formula of methane.
Explain the following briefly:
Cl2 is a non polar molecule, while HCl is a polar molecule.
(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
The type of bonding in X will be
Draw an electron dot diagram to show the formation of the following compound.
Methane
Give an example of the covalent bond formed by
(i) Similar atoms (ii) Dissimilar atoms
Discuss in brief about the properties of coordinate covalent compounds.
