level 9
X_sisters
楼主
1.mercury is considered to be a metal, even though it is a liquid at room temperature . what properties do u think mercury has that make it a metal?2.what is a molecule?how is a molecule of a compound different from a molecule of an element?5.write a chemical formula for each of the following for each state whether it is an element or a compound. a)one molecule of nitrogen that is made up of two atoms of nitrogen sodium nitrate b)one molecule of octane that is made up of 8 atoms of carbon and 18atoms of hydrogen
2005年07月04日 19点07分
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