. Observe the following diagram and write the answer
Na
CERT
a. Identify t
he element.
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0
Answer:
sorry I don't know
Explanation:
sorry
Answered by
1
Answer:
We know by now that the elements are the basic units of all types of matter. In 1800, only 31 elements were known. By 1865, the number of identified elements had more than doubled to 63. At present 114 elements are known. Of them, the recently discovered elements are man-made.
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