Which of the following compares longwall mining to solution mining? Longwall mining involves a series of explosion while solution mining is used to shear coal from mine walls.
Longwall mining involves hot water injected into the ore to dissolve it while solution mining involves a series of explosion.
Longwall mining involves hot water injected into the ore to dissolve it while solution mining is used to shear coal from mine walls.
Longwall mining is used to shear coal from mine walls while solution mining involves hot water injected into the ore to dissolve it.

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a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

that's what i got you can count the number of atoms

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.