Question

An element X (atomic number 12) reacts with an element Y (atomic number 17) to form a divalent halide.

a) Mention the positions of these elements in the periodic table.

b) Classify X and Y as metal (s), non-metal(s) or metalloid(s).

c) Which one of these will have a larger atomic radii? Why?

d) Show the transfer of electrons in the formation of this ionic compound.

Answer 1

Answer:

X is Magnesium (atomic no. 12)

Y is Chlorine (atomic no. 17)

a) refer any periodic table

b) X is metal

Y is non-metal

c) Y, more no. of electrons

d) compound formed Magnesium Chloride

Answer 2

Answer:a] X: 3rd period and 2nd group

Y: 3rd period and 17th group

b] X is metal and Y is non-metal

c] X will have larger atomic radii

d]  Cl.  + xMgx  + .Cl = Cl.xMgx.Cl = MgCl2

Explanation:

c] X will have a larger atomic radius because the atomic size decreases as we go from left to right in a period.