Chemical bond — রাসায়নিক বন্ধন
A chemical bond is the electrical attraction that holds atoms or ions together in a compound or a crystal.
Definition
A chemical bond is the force of electrical attraction that links atoms together so they can settle into a lower-energy, more stable electron arrangement — usually a full outer shell. Electrons do the actual bonding: they may be transferred completely (ionic bond), shared in pairs (covalent bond), or pooled freely through a whole metal lattice (metallic bond). Which style an atom picks depends mainly on how many valence electrons it has and how tightly it holds them.
For example
In table salt, sodium and chlorine are held by an ionic bond; in the water you drink, hydrogen and oxygen are held by covalent bonds; in a copper wire, copper atoms are held by a metallic bond.