Which statement is true about ionic compounds?
solid ionic compounds are good conductors of electricity.
ionic compounds have varying solubilities in water.
ionic compounds have very low melting points.
ionic compounds are very easy to bend.

The following statement is true about ionic compounds:

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Further Explanation:

Ionic compounds

These are formed because of electrostatic attractive forces between the ions of opposite charges. Ionic bonds are present in such compounds. In the formation of ionic compounds, an electropositive atom loses an electron and forms a positively charges species known as a cation. This electron is gained by an electronegative atom and as a result, negatively charged species are formed which are called anions.

Ionic compounds conduct electricity only in their molten or aqueous states due to the presence of free electrons in them. But solid ionic compounds have their constituent ions fixed in their specified positions so electrons are not free to move and therefore these do not conduct electricity.

Ionic compounds have varying solubilities in water. This is because of the different extent of the attraction between the ionic compounds and water. If the attraction between the ionic compound and water is strong enough to break the compound into ions, it will be soluble in water and vice-versa. For example, NaCl and AgCl both are ionic compounds. NaCl is highly soluble in water whereas AgCl is insoluble in water.

Ionic compounds are formed due to electrostatic forces between the oppositely charged ions. These forces are extremely strong in nature and therefore ionic compounds have high melting points.

The existence of strong electrostatic forces between ionic compounds is responsible for their hardness. The constituent ions of an ionic compound are so tightly packed that they cannot bend. Even if force is applied to ionic compounds, they develop a crack but can never bend.

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Answer details:

Grade: High School

Chapter: Ionic and covalent compounds

Subject: Chemistry

Keywords: ionic compounds, cations, anions, crack, bend, electrostatic forces, AgCl, NaCl, water, soluble, insoluble, strong, attraction, opposite charges.

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.