Question

What is the correct name of $CaB{r_2}$ ?
A. Monocalcium dibromide
B. Calcium (II) bromide
C. Calcium dibromide
D. Calcium bromide
E. Calcium bromide (II)

Answer 1

In order to write the correct name of the given compound, we must know about the symbols of an element and which symbol indicates which element. Here, the given formula is $CaB{r_2}$where, $Ca$ indicates calcium and $Br$indicates bromine.

Complete answer:
Let’s understand the naming of this compound step by step.
The given compound $CaB{r_2}$ is an ionic compound. This compound is commonly hydrated salts with two molecules of water. Since calcium, $Ca$is a metal and bromine, $Br$ is a non-metal and we know that when metal and non-metal combine, it forms an ionic bond.
The name of the given compound $CaB{r_2}$ is calcium bromide.
Just think that in this compound there are two bromines so why don’t we name it as calcium dibromide? This is because when calcium forms ionic compounds, the oxidation state of calcium is $+ 2$ and bromine has $- 1$charge. Since, two bromines are required to balance one calcium. This happens automatically. So, the prefix “di” is dropped. There is no need to use “di” for $CaB{r_2}$.
Therefore, the name of the given compound is $CaB{r_2}$ is calcium bromide.

Hence, the correct answer is option (D).

Note:
Now, let’s see some of the application of calcium bromide, $CaB{r_2}$ is that it is used as aqueous dense solution for drilling fluids. It is also used in neuroses medication, freezing mixtures, food preservatives, and photography and fire retardant. The hydrated form is mainly used in drilling fluids.