Sodium metal (atomic weight 22. 99 g/mol) adopts a body-centered cubic structure with a density of 0. 97 g/cm3. You may want to reference (page) section 12. 3 while completing this problem. Use this information and avogadro's number (na = 6. 022×1023) to estimate the atomic radius of sodium in å (angstrom).

The graph shows the populations of two species in a particular region over two decades. based on the graph, what can you conclude about the relationship between the two species? a. the two species have a parasitic relationship. b. the two species are mutualistic in nature. c. the two species exhibit commensalism. d. the two species have a prey-predator relationship. e. the two species have a familial relationship.