Question

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

Answer 1

Answer:

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.

Answer 2

Answers

_____________________

i) Valency of chlorine -

The atomic number of chlorine is 17 . The chlorine atom has 17 electron so it electron configuration is k-2 ,L-8, M-7 . A chlorine has 7 electron in its valence shell ( M shell ) . A chlorine atom can accept one more electron to achieve the inert gas electron arrangement ( of 8 valence electrons ) , so the valency of chlorine is 1 .

_____________________

ii) Valency of sulphur -

The atomic number of sulphur is 16 . The sulphur atom has 16 electron so it electron distribution is k - 2 ,L - 8 , M - 6 . A sulphur atom has 6 electrons in its valence shell ( M shell ) . A sulphur atom can accept two more electron to achieve the inert gas electron arrangement ( of eight valence electrons ) , so the valency of sulphur is 2 .

_____________________

iii) Valency of magnesium -

The atomic number of magnesium is 12 . the magnesium atom has 12 kilo pron so it's electron configuration is k - 2 , L - 8 , M - 2 . A magnesium atom has two electrons in its outermost shell ( M shell ) . A magnesium atom can lose its to outermost electron to achieve the inert gas electron configuration ( of 8 valence electrons ) ,so the valency of magnesium is 2.

_____________________