Question

An elements x belong to 3rd period and group 13of the modern periiodic table (a) determine the valence electrons and the valency of x (b)molecules formula of the compounds formed when x reacts with y at.no 8 (c ) write the name and formula of the compound formed when x combines with chlorine

Answer 1

This element is Al(Aluminum)

(a) Valence electrons = 2,8,3

Valency = +3

(b)When X reacts with Y(Oxygen) = Al2O3

(c) When it combines with Cl = AlCl3

Please mark it as the brainliest.

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