Complex sentence: Carbon-12 is the more abundant of the two stable isotopes of the element carbon, accounting for 98.89% of carbon; it contains 6 protons, 6 neutrons and 6 electrons.
Split into simpler sentences: Carbon-12 is the more abundant of the two stable isotopes of the element carbon, accounting for 98.89% of carbon. It contains 6 protons, 6 neutrons and 6 electrons.