Nitrogen gas (n2) is an unusable form of nitrogen for many organisms. during the nitrogen cycle, nitrogen gas is converted to usable forms such as ammonia (nh3). what is one way that nitrogen is converted into a usable form such ammonia (nh3)

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.