What is the relationship among the number of valence electrons in the elements for each column? (Use ONLY lowercase letters. Enter "groups = " (group, space, equal sign, space). Then enter the answer which consists of two words. After the 1st word, enter a space and use the plural form for the 2nd word.) *

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.