Please help. Write the equation and create a model to show the decomposition of sodium nitride. Draw a model. ​

All of the following are part of the biosphere except

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?