Question

(a) In the formation of compound between two atoms A and B, A loses two electrons and B gains one electron.

(i)What is the nature of bond between A and B ?



(ii) Suggest the formula of the compound formed between A and B.



(b) On similar lines explain the formation of Mg Cl2 molecule.



(c) Common salt conducts electricity only in the molten state. Why ?



(d) Why is melting point of NaCl high

Answer 1

A) 1.ionic
2.AB2
B)Mg has 2 electrons in its outermost shell so looses 2 electrons to attain stability to 2 Cl each as Cl has 1 electron less in its outermost shell. Hence Mg2+ reacts with 2Cl- to give MgCl2.
C) common salt conduct electricity only in molten state because ions are free to move and conduct electricity.
D) as the size of Na ion and Cl ion is small so bond formation between NaCl is too strong. For dissociation of NaCl, large amount of heat is required. Therefore, melting point of NaCl is high.

Answer 2

Heyyaa!!

Here is the answer to your question!!

Answer:

A) 1.ionic

2. AB2

B) Mg has 2 electrons in its outermost shell so looses 2 electrons to attain stability to 2 Cl each as Cl has 1 electron less in its outermost shell. Hence Mg2+ reacts with 2Cl- to give MgCl2.

C) Common salt conduct electricity only in molten state because ions are free to move and conduct electricity.

D) As the size of Na ion and Cl ion is small so bond formation between NaCl is too strong. For dissociation of NaCl, large amount of heat is required. Therefore, melting point of NaCl is high.

Hope it helps you!!