Allotrope has the same chemical properties but different physical properties.
Allotropes of carbon are :
Diamond, Graphite, and Buckminsterfullerene have similar chemical properties, but different physical properties.
Diamond has a rigid structure. It does not conduct electricity. It is a very hard substance.
Graphite has a simpler structure. It has free electrons and thus conducts electricity. It is a light substance when compared to diamonds.
Buckminsterfullerene is an allotrope found recently, it resembles a football-like structure.
Isotopes of Carbon:
There are three isotopes of carbon 12C, 13C, and radioactive 14C. All of these differ in their atomic mass i.e. the number of neutrons which is 6 for 12C, 7 for 13C, and 8 for 14C. These are the most prominent isotopes of C.
b) Oxygen
There are several known allotropes of oxygen. The most familiar is molecular oxygen (O2), present at significant levels in Earth's atmosphere and also known as dioxygen or triplet oxygen. Another is the highly reactive ozone (O3).
Others include:
Atomic oxygen (O1, a free radical)
Singlet oxygen (O2), either of two metastable states of molecular oxygen
Tetraoxygen (O4), another metastable form of Solid oxygen, existing in six variously colo
There are three stable isotopes of oxygen that lead to oxygen (O) having a standard atomic mass of 15.9994 u. Naturally occurring oxygen is composed of three stable isotopes, 16O, 17O, and 18O, with 16O being the most abundant (99.762% natural abundance). Known oxygen isotopes range in mass number from 12 to 28.
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