Chemical bond

Reaction between X and Y forms a compound Z. In this reaction X loses electrons and Y gains electrons, then which of the following property is generally not shown by Z?

Define a chemical bond.

Two elements X and Y have atomic numbers 12 and 16 respectively. If these two elements combine together, the type of bond will be

A compound formed by the partial or complete replacement of (aq) ions of an acid by a metal ion or an electropositive ion, is called a _____.

Atomic numbers of four elements $\mathrm{P}, \mathrm{Q}, \mathrm{R}$ and $\mathrm{S}$ are $6, 10, 12$ and $17$ respectively. Which two elements can combine to form a covalent compound?

The atomic numbers of four elements $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ are $6, 8, 10$ and $12$ respectively. The two elements which can react to form ionic bonds (or ionic compounds) are:

What is an ion? What is an ionic bond? 

What is a covalent bond?