Question

An element 'X' belong to 31d period and group 13 of the Modern Periodic Table. (a) Determine the valence electrons and the valency of 'X'. (b) Molecular formula of the compound formed when 'X' reacts with an element 'Y' (atomic number = 8). (c) Write the name and formula of the compound formed when 'X’ combines with chlorine

Answer 1

Valancy of x is 3,

valance electron of x is 3 ,

x2y3 is the formula, xcl3 ,

name couldn't be given because 31 period does not exist.

On the other hand the valency of x is not lies in the same period and also it never calculate the value of object with the given values with no risk trouble of it.

Answer 2

Answer:

Given :

X belongs to period 3rd and group 13th.

Atomic number of X is 13.

Electronic configuration of X

= > 2 , 8 , 3

a ) .

Valance electron in 'X' is 3 .

Valency is 3 as it denote 3 electron to become stable.

b ) .

Given :

Atomic number of Y is 8

Electronic configuration of Y :

= > 2 , 6

Valency of Y is 2 as it need 2 electron to become stable.

Molecular formula X with Y is as :

X     Y

3    2

= > X₂Y₃

c ) .

Valency of X = 3

Valency of Cl = 1

Molecular formula of X with Cl :

X    Cl

3     1

= > XCl₃