Question

1. what is the formula of calcium bromide?

options:
○ cabr
○ cabr₂
○ ca₂br
○ ca₂br₂
clear all

Explanation:

Step1: Determine ion charges

Calcium (Ca) is in group 2, so it forms a \(Ca^{2+}\) ion. Bromine (Br) is in group 17, forming a \(Br^-\) ion.

Step2: Balance charges

To balance the \(2+\) charge of \(Ca^{2+}\), we need two \(Br^-\) ions (since \(2\times(1 -)= 2 -\), balancing \(2+\)). So the formula is \(CaBr_2\).

Answer:

B. \(CaBr_2\)