Question

Three elements X, Y and Z have atomic number 7, 8 and 9 respectively.

a) Arrange them in the decreasing order of their atomic radii.

b) Which of the three is most electronegative? Why?

c) Write the formula of compound formed between i) X and Y ii) X and Z​

Answer 1

Answer:

a) 7>8>9.

b) Z is most electronegative because as we move from left to right in a period electronegativity increase.

c) Valency of : X=3, Y =2, Z=1.

i) X2Y3

ii) XZ3.

Hope it is clear.