What is needed to balance the nuclear fission reaction below? 
n + 
U → 
Te + ? + 2 
n
Definitions:
Lichen
Symbiotic organisms comprised of a fungus and a photosynthetic partner (usually an alga or cyanobacteria) living together in a mutually beneficial relationship.
Carbon Cycle
The natural process of carbon being exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of Earth, essential for life.
Phosphorus Cycle
The cycle that explains how phosphorus circulates through the Earth's crust, water bodies, and ecosystems.
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