Describe how the periodic table could be used to determine similarities in reactivity

What are four significant sources of ghgs that come from wostem washington?

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Describe the forces both attractive and repulsive that occur as two atoms move closer together.