Chemical Elements Basics
Category:
Science: Chemistry
Created: 21.12.2008
Questions: 103
Type: Normal
Language: English
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Questions
21.12.2008
21.12.2008
2.
This silvery-white metal is the most abundant metallic element in the Earth´s crust
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21.12.2008
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5.
Which member of the noble gas group makes up nearly one percent of the earth´s atmosphere
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6.
Which element of the nitrogen family has an atomic number of 33, and the symbol As
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7.
This element having the symbol At is a radioactive member of the halogen group
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21.12.2008
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21.12.2008
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