Which one of the following statements best describes the term "Quarks" often seen in the news?
1
A type of organic light emitting diode incorporating a flexible plastic substrate on which the electroluminescent organic semi-conductor is deposited.
2
Elementary particles that usually combine in groups of two's and three's to form hadrons such as the protons and neutrons that make up atomic nuclei.
3
A technology that generates electricity by direct conversion of light into electricity.
4
It is the process by which two light atomic nuclei combine to form a single heavier one while releasing massive amounts of energy.