In the term trace element, the word trace means that ___A. the element improves health but is not essential for the organism's long-term survival. B. the element can be used as a label to trace atoms through an organism's metabolism. C. the element is required by the body in very small amounts. D. the element is very rare on Earth.

Many free radicals combine to form molecules that do not contain any unpaired electrons. the driving force for the radical–radical combination reaction is the formation of a new electron‑pair bond. consider the chemical equation. n(g)+no(g)⟶nno(g) n(g)+no(g)⟶nno(g) write lewis formulas for the reactant and product species in the chemical equation. include nonbonding electrons. n(g)n(g) select draw rings more erase select draw rings more erase select draw rings more erase n no(g)