1. Elements in the middle of the periodic table are known as these kinds of metals...
-rare earth metals
-noble
-transition
-naturally
2. These gases are considered inactive. They do not react with other elements...
-rare earth metals
-noble
-transition
-naturally
3. For convenience, these are placed at the bottom so the periodic table does not become too wide to be represented in chart form...
-rare earth metals
-noble
-transition
-naturally
4. There are 92 elements, from hydrogen to uranium that occur in this manner...
-rare earth metals
-noble
-transition
-naturally
2007-12-09
09:21:01
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4 answers
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asked by
Anonymous
in
Science & Mathematics
➔ Chemistry