Question

when the electrons of a chemical element change energy states, they release certain wavelengths of light that are unique to that element. this means that the emission of light with a wavelength of 516.7 nanometers(nm), which falls in the 500 - 570 nm range defining the green portion of the visible spectrum, ___ the element iron as the source of the light. which choice completes the text so that it conforms to the conventions of standard english? a) identifying b) identifies c) to identify d) having identified

Explanation:

The text describes how elements can be identified by the unique wavelengths of light they emit when electrons change energy states. The blank should be filled with a word related to this identification process. "Identifies" is the correct verb form to complete the sentence in a grammatically and context - appropriately way.

Answer:

B. identifies