Question

Which of the following element pairs will form an ionic bond? 

 

• A. P
• B. Q
• C. R
• D. S

Hint:

Ionic bonds usually form between elements on opposite sides of the periodic table (excluding noble gases)!

Answer 1

The Correct Option is C

Step 1: Understanding Ionic Bonding: 
An ionic bond is formed by the complete transfer of electrons from a metallic element (electropositive) to a non-metallic element (electronegative). 

Step 2: Analyzing the Pairs: 
Pair P: Both Group 1 and Group 2 are metals. Two metals do not form ionic bonds with each other. 

Pair Q: Elements of Group 14 (like Carbon) and Group 16 (like Oxygen) are both non-metals and typically form covalent bonds. 

Pair R: Group 2 (Metals) and Group 17 (Non-metals/Halogens) have a high difference in electronegativity, leading to ionic bond formation (e.g., MgCl_2). 

Pair S: Group 18 consists of noble gases which are chemically inert and rarely form bonds.

 
Step 3: Conclusion: 
The combination of a metal from Group 2 and a non-metal from Group 17 results in a stable ionic compound. 

Step 4: Final Answer: 
The correct pair is R.