Note: your teacher will review your response to this question to ensure you receive proper credit for your answer. The pH scale is a measurement system that indicates the concentration of in solution. please help

hydrogen and hydroxide ions

Explanation:

The pH scale indicates the concentration of hydrogen ions (H+) and hydroxide ions (OH-) in a solution.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.