Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structure
The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...
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Metals and non-metals
The position of an element on the periodic ... along with the metal elements in the transition metal block of the periodic table and their properties. Gethin: I think this is going to be good ...
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Chemistry in its element: lawrencium
You might think that these experiments and others like it would have settled the precise position of lawrencium ... number of more recent periodic tables you will find lutetium and lawrencium ...