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How many elements are there?
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There are about 106 known chemical elements. Just over 90 of them occur naturally on earth. The remainder have been made artificially by scientists. About three quarters of all elements are metals. The rest are gases and five are non-metallic solids. | | The elements can be studied by chemical analysis |
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Previous:
Back
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Book:
1001
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Section:
Science and Technology
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Chapter:
Chemistry
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