Question

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
please answer by telling the option..​

Answer 1

Required 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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Know more !!

• 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.

Answer 2

$\Large\bf{\color{indigo}CoNcEpT,}$

☆ We know that Mg is placed in 12th position of the periodic table.

$\bf\pink{Means}$

• At. no. of Mg is 12.

$\bf\red{Electronic\:Configuration,}$

$\green\longmapsto\:\:\bf\blue{1s^2\:2s^2\:2p^6\:3s^2\:}$

$\bf\purple{We\:know\:that,}$

☆ The electrons which are present in the outermost shell is known as Valency electrons.

☆ And Valency of an element is the no. of valency electron.

✒ From the above electronic configuration, we saw that two electrons are present in the outermost shell.

✒ Hence, the valency of Mg is 2.

✔ According to the electronic theory of valence, the number of electrons participating in the formation of chemical bond is the no. of valency electrons Or valency of the element.

$\Large\bf\pink\therefore$ a) The number of electrons participating in the formation of cheimical bond in Magnesium is 2.

$\orange\bigstar\:\:\mid\mid{\boxed{\boxed{\green{\bf{(a)\:2\:}}}}}\mid\mid$