Question

Calcium forms ions with a charge of +2. Iodine forms ions with a charge of -1.

Which of the following would represent an ionic compound composed of Calcium and Iodide ions?

options:
CaI2
CaI
Ca2I
Ca2I
2CaI
CaI2

Answer 1

The correct ionic compound composed of Calcium and Iodide ions is CaI2.

Step-by-step explanation:

An ionic compound is a chemical compound composed of positively charged ions (cations) and negatively charged ions (anions) held together by ionic bonds. These bonds form through the transfer of electrons from one element to another, resulting in electrostatic attraction. Ionic compounds typically have a crystalline structure and high melting and boiling points.

Common examples include sodium chloride (NaCl), where sodium (Na+) donates an electron to chlorine (Cl-) forming a stable ionic lattice. Ionic compounds often exhibit good electrical conductivity when dissolved in water or melted. Calcium forms ions with a charge of +2 and iodine forms ions with a charge of -1. To create an ionic compound, the charges of the ions must balance. The correct ionic compound composed of Calcium and Iodide ions is CaI2.

Answer 2

Answer : The correct option is
`CaI_2`.

Explanation :

Ionic compound : It consist of a metal and non-metal. It is made up of ions that gains or lose electrons and giving them a net positive and negative charge.

Metals have tendency to lose electrons easily, so they become cation which have a positive charge and non-metal have tendency to gain electrons, so they become anion which have a negative charge.

As we know that the Calcium forms ions with a charge of (+2) and Iodine forms ions with a charge of (-1).

Two iodide ion will require to combine with one calcium ion for a neutral compound.

Therefore, the correct representation of an ionic compound of Calcium and Iodide ions is
`CaI_2`.

The image is shown below.