Question

how will you find the valency of chlorine Sulphur and magnesium​

Answer 1

Answer:

chlorine = -1, sulphur = -2, magnesium = +2

Explanation:

chlorine = 17 = 2,8,7

to attain near most noble configuration

1 must be added

so valence will be - 1 because when an electron is added, the atom will attain - charge and vice-versa.

similarly sulphur and magnesium

Answer 2

Final answer:

Valency of Chlorine, Sulphur, and Magnesium are 1, 2, 2 respectively.

Given that: We are given the element name Chlorine, Sulphur, and Magnesium.

To find: We have to find valency of Chlorine, Sulphur, and Magnesium.

Explanation:

• Valency is the number of electrons which are required to complete the outermost shell i.e. octate.

• Number of electrons present in the outer most shell of the atom of an element is called valance electron.

• Valance electrons of the atom of an element is more than 4 we need to subtract it from 8 to get the valency.

• If the number of electrons present in the valance shell of the atom of an element is less than or equal to 4, then valency is the number of electron in the outer most shell.

• Maximum number of electron present in the K,L,M,N shell are 2,8,8,8 respectively.

• To know valency we should know atomic number.

• Atomic number of Chlorine Cl = 17

Electronic configuration = 2,8,7  

(2 K-shell electron, 8 L-shell electron, 7 M-shell electron)

Here M shell is the outer most shell.

Valance electrons of Cl = 7 which is greater than 4.

Hence valency of Cl = 8-7 = 1

• Atomic number of Sulphur S = 16

Electronic configuration = 2,8,6  

(2 K-shell electron, 8 L-shell electron, 6 M-shell electron)

Here M shell is the outer most shell.

Valance electrons of S = 6 which is greater than 4.

Hence valency of S = 8-6 = 2

• Atomic number of Magnesium Mg = 12

Electronic configuration = 2,8,2  

(2 k-shell electron, 8 L-shell electron, 2 M-shell electron)

Here M shell is the outer most shell.

Valance electrons of Mg = 2 which is less than 4.

Hence valency of Mg = 2

To know more about the concept please go through the links

https://brainly.in/question/4730514

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