Based on its electron structure, infer the reason hydrogen can be included with both the alkali metals and the halogens. provide examples of compounds that it forms in both these roles. in both the both the aikai metala

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.