ANSWER
Diatomic -----------> composed of two atoms
Polar ------------> A bond with a negative end and a positive end
Ionic --------> bond formed between ions
Electronegativity ----------> ability of an atom to attract electron
Non-polar -------> A bond with equal sharing of electrons
Step-by-step explanation
Diatomic molecules are molecules that consist of two atoms
Hence, Diatomic -----------> composed of two atoms
Polar bond is a type of bond between two atoms in which electrons are shared unequally. one end of the molecule has a slight negative charge and the other end of the molecule has a slightly positive charge
Hence, polar ------------> A bond with a negative end and a positive end
ionic bond is a type of bond that exist between ions
Hence, Ionic --------> bond formed between ions
Electronegativity is defined as the tendency of an atom to attract electron to its self
Hence, electronegativity ----------> ability of an atom to attract electron
Non polar is a type of bond in which electrons are shared between two atoms equally
Hence, Non-polar -------> A bond with equal sharing of electrons