What is used to write on a blackboard? (carbon-hydrogen-aluminum-potassium ) Can you recognize the words that form from the CORRECT chemical symbols? CHAlK chalk CHALK Chalk

Is this a single replacement reaction or there is no

Which other elements contain the same number of outer electrons as sodium

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.