Between carbon and silicon, which element has the strongest attraction between its nucleus and its valence electrons? Explain?

How do you lengthen a pattern piece? (family and consumer science, sewing)

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.

How many moles are in 43.9 l of oxygen