What are the ions present in \[Ca{\left( {N{O_3}} \right)_2}\] compound?

Hint: Calcium nitrate has two ions. Just simply by looking at the compound formula, it can tell which all ions are combining to form the compound. This compound calcium nitrate has one $C{a^{2 + }}$ ion and two \[N{O_3}^-\] ions. It is an inorganic salt.

Complete answer:
Calcium nitrate \[Ca{\left( {N{O_3}} \right)_2}\] is a colorless salt. It does not have any odor. It is commonly found in tetrahydrate form. The production of calcium nitrate includes treating limestone with nitric acid followed by neutralization with ammonia. The reaction of production of \[Ca{\left( {N{O_3}} \right)_2}\] is as follows:
\[CaC{O_3}\; + {\text{ }}2HN{O_3}\; \to {\text{ }}Ca{(N{O_3})_2}\; + {\text{ }}C{O_2}\; + {\text{ }}{H_2}O\]
In the compound \[Ca{\left( {N{O_3}} \right)_2}\] contains one atom of calcium and two atoms of nitrate bonded to each other. When the formation of the compound \[Ca{\left( {N{O_3}} \right)_2}\] take place, calcium donates its two electrons and from $Ca$ it gets converted to $C{a^{2 + }}$, while two ammonium ions gain one electron each and get converted into nitrate ion \[N{O_3}^-\]. Thus the ions present in \[Ca{\left( {N{O_3}} \right)_2}\] are $C{a^{2 + }}$ and \[2N{O_3}^-\].
\[Ca{\left( {N{O_3}} \right)_2}\] is also called Norges Saltpeter. When calcium nitrate is dissolved in water it becomes acidic. When calcium nitrate is heated then it gets decomposed like the alkaline earth metals and releases nitrogen dioxide and the heating starts at ${500^0}C$.
Calcium nitrate is mainly used in agriculture as a fertilizer. It can be used as a raw material for the production of other nitrate compounds. It is used to improve the storage quality of crops, reducing bitter pit in apples. \[Ca{\left( {N{O_3}} \right)_2}\] is also used to make fireworks and incandescent lamp chimneys in the light industry.

Note:
In wastewater pre-conditioning, calcium nitrate is used for odor emission prevention. It is used in set accelerating concrete admixtures. \[Ca{\left( {N{O_3}} \right)_2}\] is very helpful for the plants. It helps in the formation of the cell but its main purpose is to neutralize the acids to detoxify the plants. It is good for plants but human exposure to \[Ca{\left( {N{O_3}} \right)_2}\] can cause headache, dizziness, nausea and vomiting.