What is the frequency for electromagnetic radiation with a wavelength of 3.10x10^-7 m?

On a distance vs time graph the line of an object at rest is a

Element before carbon on the periodic table

Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons