There are two types of atomic bonds - ionic bonds and covalent bonds. They differ in their structure and properties. Covalent bonds consist of pairs of electrons shared by two atoms, and bind the atoms in a fixed orientation. Relatively high energies are required to break them (50 - 200 kcal/mol). Whether
two atoms can form a covalent bond depends upon their electronegativity i.e. the power of an atom in a molecule to
attract electrons to itself. If two atoms differ considerably in their electronegativity - as sodium and chloride do - then one of the atoms will lose its electron to the other atom. This results in a positively charged ion (cation) and negatively charged ion (anion). The bond between these two ions is called an ionic bond.Covalent BondsIonic Bonds State at room temperature:
Liquid or gaseous
Solid
Polarity:
Low
High
Formation:
A covalent bond is formed between two non-metals that have similar electronegativities. Neither atom is "strong" enough to attract electrons from the other. For stabilization, they share their electrons from outer molecular orbit with others
An ionic bond is formed between a metal and a non-metal. Non-metals(-ve ion) are "stronger" than the metal(+ve ion) and can get electrons very easily from the metal. These two opposite ions attract each other and form the ionic bond.
Shape:
Definite shape
No definite shape
Melting point:
low
High
What is it?:
Covalent bonding is a form of chemical bonding between two non metallic atoms which is characterized by the sharing of pairs of electrons between atoms and other covalent bonds.
Ionic bond, also known as electrovalent bond, is a type of bond formed from the electrostatic attraction between oppositely charged ions in a chemical compound. These kinds of bonds occur mainly between a metallic and a non metallic atom.
Boiling point:
Low
High
Examples:
Methane (CH4), Hydrochloric acid (HCl)
Sodium chloride (NaCl), Sulfuric Acid (H2SO4 )
Occurs between:
Two non-metals
One metal and one non-metal
Home
Covalent bond is formed between:
Question
A
metals
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
metal and non-metal
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
two non-metals
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
non-metal and an ion
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is C
two non-metals
A covalent bond is formed between two non-metals. The sharing of electron pair takes place between their atoms and a covalent bond is formed.
Suggest Corrections
3
Similar questions
Q. Molecular compounds
are usually formed by the combination between :
(a) a metal and a non-metal
(b) two different non-metals
(c) two different metals
(d) any two gaseous elements
Q. Complete the incomplete statements with missing words:
(a) Metals are _________ while non-metals are
___________ poor conductors of heat.
(b) Metals are malleable while non-metals are ___________.
(c) Metals form positive ions while non-metals ___________.
(d) Non-metals form acidic oxides while metals form __________.
Q. The formation of calcium oxide from its elements is a
reaction between
(a) two metals.
(b) two non-metals.
(c) a metal and a non-metal.
(d) an alkali and an acid.
Q. A bond with the maximum covalent character between non-metallic elements is formed :
Q. Assertion :Compounds formed between non-metal are largely covalent in character.
Reason: Non-metals readily form anions.
View More