Draw the electron-dot structures of the following compounds and state the type of bonding in each case:

(i) KCl (ii) NH₃ (iii) CaO (iv) N₂ (v) CaCl₂

38 Draw the electron-dot structures of the following compounds and state the type of bonding in each case:

(i) C0₂ (ii) MgO (iii) H₂0 (iv) HCl (v) MgCl₂

39 Using electron-dot diagrams which show only the outermost shell electrons, show how a molecule of oxygen, 02, is formed from two oxygen atoms. What name is given to this type of bonding? (At. No. of oxygen= 8) 41 Explain why, a salt which does not conduct electricity in the solid state becomes a good conductor in molten state. 42 Write down the electronic configuration of (i) sodium atom, and (ii) chlorine atom.