Question

Elements Q and S form an ionic compound. Which physical state will the compound QS exist in normal condition?

Answer 1

Hint: We know that ionic compounds are generally compounds that are made up of metal and non-metal by transfer. As we know ionic bonds hold the ions together to form ionic compounds. Ionic compounds are crystalline and the arrangement of ions is seen in a regular and repeated way. Metal and non-metals could be present either in the form of solid, liquid (or) gas.

Complete step by step answer:
We know that ionic compounds are those formed between a metal with a nonmetal by transfer of electrons. The bond formed in ionic compounds is called ionic bonds. Ionic compounds show the presence of positively charged ions known as cations and negatively charged ions known as anions. These compounds are solids in nature and have high boiling and melting points. They conduct electricity when in molten or aqueous state.
We can discuss about the some of the physical properties of ionic compounds as,
Solubility: Ionic compounds are highly water-soluble.
Melting and Boiling points: High melting and boiling points are high in ionic compounds. Under normal room temperatures, these compounds are found in solid state.
Nature: Ionic compounds are crystalline solids and are hard and brittle.
Conduction of electricity: Since ionic compounds are water-soluble, they are good conductors of electricity when dissolved in water.
We know that the physical states of elements are,
1. Solids
2. Liquids
3. Gases
Elements Q and S should be either nonmetal (or) metal as the ionic compound SQ would be formed when one of the elements loses its electrons and gain of electrons by another element.
Since, ionic compounds exist as solid at room temperature. The element Q and S would be solid.

Note:
Let us discuss some of the common examples of ionic compounds,
Sodium chloride is an ionic compound. The compound $NaCl$ is made up of sodium and chlorine elements. Sodium is a metal that belongs to group 1 (alkali metals) and chlorine is a nonmetal that belongs to group 17 (halogens).
Potassium iodide is an ionic compound. The compound $KI$ is made up of potassium and iodine elements. Potassium is a metal that belongs to group 1 (alkali metals) and iodine is a nonmetal that belongs to group 17 (halogens).
Magnesium bromide is an ionic compound. The compound $MgB{r_2}$ is made up of magnesium and bromine elements. Magnesium is a metal that belongs to group 2 (alkaline earth metals) and bromine is a nonmetal that belongs to group 17 (halogens).