Why was it so important that the electron was smaller than the atom?

because electron is a negetively charge particle that orbits the outer part of atom and despite being small it is a strong proton.

Explanation:

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.