MCQ
Which combination forms strongest ionic bond
- A$Ca^{+2}, Cl^-$
- B$K^+, O^{-2}$
- C$K^+, Cl^-$
- ✓$Ca^{+2}, O^{-2}$
✓
Answer
Correct option: D.
$Ca^{+2}, O^{-2}$
d
Ionic bond strength depends on two things :
Ionic bond strength depends on two things :
$a)$ Ionic charge - the greater the product of the ionic charges. the stronger the bond.
$b)$ Ionic size - the lower the sum of the anion and cation radii, the stronger the bond.
$Ca ^{+2}$ and $O ^{-2}$ ions have smaller sizes and more charges compared to the rest. They will form a stronger ionic bond.
Therefore, the correct option is $D.$
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