Question

An element X having atomic number 19 reacts with Y having atomic no. 17 to form a compound.[5]

Answer the following questions based upon the above data.

i) Calculate the valency of X and Y

ii) What is the chemical formula formed between X and Y?

iii) Which of the above is a metal and which is a non-metal?

iv) Why do X and Y reacts ?

v) Name the electropositive and electronegative elements? ki ​

Answer 1

Answer:

i Valency of X is 1 and valency of Y is 1

ii XY

iii X is a metal and Y is a non metal

iv They react to complete their electronic configuration or to be stable.

v X+ is electropositive and Y- is electronegarive