Question

How will you find the valency
of chlorine, sulphur and
magnesium​

Answer 1

Answer:

How will you find the valency of chlorine sulphur & magnesium

If the number of electrons in the outermost shell of the atom of an element is less than or equal to 4, then the valency of the element is equal to the number of electrons in the outermost shell. On the other hand, if the number of electrons in the outermost shell of the atom of an element is greater than 4, then the valency of that element is determined by subtracting the number of electrons in the outermost shell from 8. The distribution of electrons in chlorine, sulphur, and magnesium atoms are 2, 8, 7; 2, 8, 6 and 2, 8, 2 respectively. Therefore, the number of electrons in the outer most shell of chlorine, sulphur, and magnesium atoms are 7, 6, and 2 respectively.Thus, the valency of chlorine = 8 -7 = 1

The valency of sulphur = 8 – 6 = 2

The valency of magnesium = 2

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Answer 2

Explanation:

To find valency , generally their atomic number is divided into different shells.

K = 2, the first shell holds 2 electrons. The rest shells L , M etc hold 8 electrons. Every atom tries to complete their number of electrons in their last shell. So if the last shell has less than 4 electrons then it loses those electrons thus that becomes its valency. If it has more than 4 electrons it takes the rest of electrons to complete the last shell with 8 electrons ; by preparing bonds.