Ionic or Electrovalent Bond

Generally which is the larger charge in size one positive charge or one negative charge?

By giving an example of an ionic compound show that its ions do not obey octet rule?

We know that Electronegativity is directly proportional to Bond Strength. In $\mathrm{NaOH}$ the electronegativity difference between sodium and oxygen is $2.6$ and electronegativity difference between oxygen and hydrogen is $1.4$. So, electronegativity difference between sodium and oxygen is high as a result bond between them should be strong as compare to bond between oxygen and hydrogen. But,$\mathrm{NaOH}$ is a good base and donate ${\mathrm{OH}}^{-}$ by breaking bond between sodium and oxygen. Why bond between them breaks as it is strong than bond between oxygen and hydrogen?

What is electrovalence ?

What do you understand by isoelectronic species ?

The table shown below gives information about four substances : $\mathrm{A}, \mathrm{B}, \mathrm{C} \mathrm{and} \mathrm{D}$

Identify ionic compounds from the above given substances.

Ionic compounds are exists as _____.

How to find out the charges of polyatomic ions?

Write electron dot diagram for chlorine (At No. $17$) and calcium (At No. $20$). Show the formation of calcium chloride by transfer of electrons. Identify the nature of the above compound and explain any three physical properties of such compound. 
 

Both ${\mathrm{O}}_2$ and ${\mathrm{F}}_2$ stabilise high oxidation states but the ability of oxygen to stabilise the higher oxidation state exceeds than that of fluorine. Account for this observation.

Explain the crystal lattice formation of $\mathrm{NaCl}$.

The crystalline structure of $\mathrm{NaCl}$ is 

What are the two types of ions?

What do you understand by monoatomic ions?

A _____ (monatomic/polyatomic) ion is an ion consisting of exactly one atom.

Which of the following is a monoatomic ion?

A monatomic ion is an ion consisting of exactly one atom.

What are the two types of Ions, and how are they different?

The number of valence electron lost by fluorine during bond formation in calcium fluoride is one.

Calcium loses _____ of its valence electrons to form an ionic bond in calcium fluoride.