Question

an element X from group 1 combines with an element Y from group 17 to form a compound.both X and Y belong to period 2.
a) give the formula of the compound formed.
b) will the compound be ionic or covalent?
c) give it's electrons dot structure.

Answer 1

X is lithium - atomic no. 3
Y is Florine - atomic no. 9

a) li3fl.

b) this will be ionic bond.


c) sorry I can't gave structure here but now you can try.

Answer 2

Given X (Group 1) & (Period 2) so X is lithium(Li)

Y(Group 17)& (Period 2) so Y is Fluorine(F)

(a) So the formula of the compound formed by X & Y is LiF

(b)The compound LiF is ionic because Fluorine(F) is electronegative.And we know that when a electronegative atom present the compound is ionic.

(c)Here is the electron dot structure of the LiF compound