Q. 114.7( 6 Votes )

Write the electron-dot structure for Na and Cl atoms. How do these form a chemical bond? Name the type of bond so formed. Why does a compound so formed have high melting point?

Answer :

The reactivity of the elements is determined by the tendency to have a completely filled valence shell. The electron dot structure of Na (sodium) and Cl (chlorine) atoms are shown in the figure below.

Electron dot structure of Na and Cl

To attain completely filled valence shell, Na has to lose the outermost electron, and Cl needs one electron to complete the valence shell.

By losing an electron, Na becomes Na+ (cation) and this electron is accepted by Cl to form Cl- (anion). The oppositely charged ions attract each other and form NaCl. They are held together by strong electrostatic forces of attraction. The bond existing between them is called an ionic bond.

Figure 1: Formation of sodium chloride

Since the inter-ionic forces are very strong, it requires a considerably large amount of energy to break the bond. Hence, ionic compounds have high melting point.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Champ Quiz | Corrosion: Types, Pros and Cons29 mins
Exceptions in Physical Properties of Metals and Non-Metals32 mins
Quiz | Physical Properties of Metals and Non-Metals24 mins
Quiz | Know About Ionic Bonding28 mins
Goprep Genius Quiz | Chemical Properties of Metals and Non-metals?!29 mins
Be a Master of Chemical Properties of Metals Within 30 Minutes30 mins
How Metals and Non-Metals React?29 mins
Non-cooperation Movement33 mins
Odd One Out49 mins
4 Mental Exercises to Make Your Brain Razor-Sharp25 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
The least reactive metal among the following is:Lakhmir Singh & Manjit Kaur - Chemistry