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

To determine which pair of elements will form an ionic bond, we need to understand the nature of ionic bonding. An ionic bond is typically formed between a metal and a non-metal, where electrons are transferred from the metal to the non-metal. This usually involves elements from Group 1 or 2 (metals) and Group 16 or 17 (non-metals) in the periodic table.

Let's analyze each given pair:

1. Pair P: Elements of Group 1 & Group 2
   • Both groups consist of metals.
   • Ionic bonds are unlikely as both types of elements tend to lose electrons.
2. Pair Q: Elements of Group 14 & Group 16
   • Group 14 contains metalloids/non-metals and Group 16 contains non-metals.
   • Although bonding could occur, it is more likely to be covalent rather than ionic due to electron sharing.
3. Pair R: Elements of Group 2 & Group 17
   • Group 2 consists of alkaline earth metals, and Group 17 contains halogens (non-metals).
   • An ideal setup for ionic bonding, where Group 2 metals lose electrons and Group 17 non-metals gain electrons, forming strong ionic bonds.
4. Pair S: Elements of Group 15 & Group 18
   • Group 15 contains non-metals or metalloids, and Group 18 contains noble gases (typically inert).
   • Noble gases rarely form bonds due to their complete electron shells, making ionic bonding unlikely.

Based on the analysis, Pair R (Elements of Group 2 & Group 17) is the most likely to form an ionic bond.