JAMB - Chemistry (2002 - No. 26)
An example of element that can catenate is
bromine
nitrogen
chlorine
carbon
Uitleg
Catenation is the ability of an atom to form chains and rings by sharing electrons with other atoms of the same element. Carbon has a high tendency to catenate because of the strength of its C–C bonds. Carbon's least diffuse valence shell p orbital allows it to form longer p-p sigma bonded chains of atoms than heavier elements.