1.

How will you find the valency of chlorine, sulphur and magensium ?

Answer»

SOLUTION :VALENCY is the combining capacity of an atom of an element. The number ofprotons = number of electrons.
Chlorine : Atomic number 17
`THEREFORE` number of protons = 17
Number of electrons = 17
`therefore` distribution of electrons :
K SHELL: 2: L shell: 8 and M shell: 7.
The outermost orbit of chlorine contains 7 electrons. So, chlorine atom will gain 1 electron to complete OCTET in the outermost shell.
`therefore` the valency of chlorine atom is 1.
`therefore` number of protons = 16
number of electrons = 16
`therefore` distribution of electrons :
K shell : 2 : L shell :8 and M shell : 6
The outermost orbit of sulphur contains 6 electrons.
So, magnesium atom would donate 2 electrons and complete octet in the outermost shell.
`therefore ` the valency of magnesium is 2.
Note: (1 ) If the atom galns electron to complete outermost shell, its valency is considered negative.


Discussion

No Comment Found

Related InterviewSolutions