Why is hydrogen placed in group one of the periodic table?

What three natural resources are found in the great lakes region

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains