Question

13. Atomic numbers of the elements X and Y are 13 and 16 respectively,
a) Write the electronic configuration of X and Y
b) Write the valency of X and Y
c) Write the molecular formula of the compound formed by the combination of
X and Y ​

Answer 1

Explanation:

Electronic configuration of x = 2,8,3

Electronic configuration of y = 2,8,6

Valency of x = 3

Valency of y = 8 - 6 = 2

Formula of compound formed by X and Y = X2Y3

Answer 2

Answer:

Given :

X and Y are two elements of atomic number 13 and 16 .

1.

Electronic configuration of X and Y :

Simply use 2 n² octet rule where n is shell starting K , L M , N etc .

X = 2 , 8 , 3

Y = 2 , 8 , 6

2.

Valency of X and Y :

For valency we know :

8 - number of electron in valence shell  [ For non metal ]

For metal : Total numbers of electrons in valence shell .

X = 3   [ Directly ]

Y = 8- 6 =  2

3.

The molecular formula of the compound formed by the combination of

X and Y :   [ Multiply cross valency to each other. ]

        X         Y

        3           2

Compound :  X₂Y₃

Hence we get all answers .