What represents of the number of protons in the nucleus of an element?

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a