What is ball?

Bucky balls are composed of carbon atoms linked to three other carbon atoms by covalent bonds. However, the carbon atoms are connected in the same pattern of hexagons and pentagons you find on a soccer ball, giving a buck ball the spherical structure as shown in the following figure. Bucky balls, also called fullerenes, were one of the first nanoparticles discovered.

A Bucky ball is any molecule composed entirely of carbon, in the form of a hollow sphere, ellipsoid, or a tube. This is the informal term used to describe these compounds which are collectively known as polyhedral carbon molecules.

A buck ball is a spherical or ellipsoidal cage made up of covalently bonded carbon atoms