Question

In the formation of compound between atoms of element A and element B atoms of element A can lose two electrons and atoms of element B can gain one electron. a. What is the nature of bond between atoms of A and atoms of B ? b. Suggest the formula of the compound formed between atoms of A and atoms of B . c. Write any two physical properties of the compound formed above. 2. Write balanced chemical equation for the reaction taking place between calcium and water .

(3 Points)

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Answer 1

Answer:

(a) Since the bond formation involves loss and gain of electrons, the bond formed must be ionic.

(b) Formation of MgCl2 molecule:

Mg→Mg2++2e−

2Cl+2e−→2Cl−

∴Mg2++2Cl−→MgCl2

(c) When NaCl is melted, the ions become mobile. Due to this they can conduct electricity.

(d) Due to strong electrostatic interactions between the ions Na+ & Cl− , more energy is required to break this interaction. Hence, due to this it has high melting point.

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