According to electronic theory of valence, the number of electrons participating in the formation of
cheimical bond in Magnesium is
a) 2
b) 3
c) 1
d) 0
Answers
Explanation:
Chemical bond is an attractive force that bounds the constituents of a chemical species together.
Theories like valence shell electron pair repulsion theory, electronic theory,
molecular orbital theory and valence bond theory have explained the formation of chemical bond.
The formation of a chemical bond is the tendency of the system to achieve stability.
An atom is said to be stable when it attains noble gas configuration that is the outermost orbitals are completely filled.
Atoms combine with one another and fill their separate octets.
Question 4.2
Write Lewis dot symbols for atoms of the following elements: Mg, Na, B, O, N, Br.
Answer.
Answer :
The number of electrons participating in the formation of chemical bond in Magnesium is equal to the number of valence electrons of Magnesium.
Magnesium atomic number is 12. These 12 electrons are arranged as 1s²2s² 2p⁶ 3s². Valence electrons the electrons present in the outermost shell. Here 3s is the outermost shell, the number of electrons present in 3s are 2. So, Number of valence electrons of magnesium are 2.
Hence, The number of electrons participate in the formation of chemical bond in magnesium are 2 and Option(a) the required answer.
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Additional Information :
Valence electrons are responsible for the formation of bond between atoms. The valence electrons determine most of the peoperties of elements. While the core electrons (other than the electrons present in outermost shell) do not involve in bond formation.