Question

3. An element X from group 2 reacts with element Y from group 17 to form a compound.
(a) What is the nature and formulae of the compound?
(b) State whether this compound conducts electricity or not?
(e) What is the valency of X and Y?
(d) How many valence electrons are there in X and Y?​

Answer 1

Hi there,

Given :

♤ X is element from group 2

♤ Y is element from group 17

☆ A) the compound XY2 is a salt

☆ B) XY2 is an ionic compound so its conducts electricity

☆ C)

◇ X is from group 2 so, its valency is divalent.

◇ Y is from group 17 so, its valency is monovalent.

☆D)

◇ X valency electrons is 2 according to its group number 2A = nS2

◇ Y valency electrons is 7 according to its group number A7 = nS2-nP5

♡ Hope the answer is helpful

♡ Plz mark it as brainliest answer

Answer 2

HELLO FRIENDS!!!!!!

(a) the compound formed when the two reacts:-

XY₂

This compound is an ionic compound since the reaction is between a metal and a non-metal.

(b) Ionic substances conduct electricity when in solution form so the substance conducts electricity when in solution form.

(c) The valence of an element is the number of electrons in the outermost energy level of the element therefore the valences are:

X = 2

Y = 17

d) X = 2 electrons

Y = 17 electrons.

I HOPE IT HELPS YOU