Question

Chemical formula of calcium nitrate is —

• A. CaNO3
• B. Ca(NO3)2
• C. Ca3NO3
• D. Ca2NO3

Hint:

Always use the criss-cross method to balance ionic charges when writing chemical formulas.

Answer 1

The Correct Option is B

Step 1: Write the ions.
Calcium ion: Ca2+
Nitrate ion: NO3–
Step 2: Balance the charges.
To balance the +2 charge of calcium, two nitrate ions (each with –1 charge) are required.
Step 3: Write the formula.
\[ \text{Ca}^{2+} + 2(\text{NO}_3^-) \Rightarrow \text{Ca(NO}_3)_2 \] Step 4: Conclusion.
Hence, the correct chemical formula of calcium nitrate is Ca(NO3){2}.