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Author Question: Calcium sulfate is the name of A. CaSO4. B. Ca2SO4. C. Ca(SN)2. D. Ca ... (Read 109 times)

dollx

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on: Aug 27, 2018
Calcium sulfate is the name of
 
  A. CaSO4.
   B. Ca2SO4.
   C. Ca(SN)2.
   D. Ca (SO3)2.

Question 2

Why were noble gases absent from Mendeleev's original periodic table of 1871?
 
  A) The noble gases are unstable.
  B) The noble gases are radioactive.
  C) The noble gases had not been discovered.
  D) The noble gases occur only in compounds.
  E) none of the above


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lou

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Reply #1 on: Aug 27, 2018
Answer to Question 1

A

Answer to Question 2

C


dollx

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Reply 2 on: Aug 27, 2018
Great answer, keep it coming :)

ebonylittles

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Reply 3 on: Yesterday
Excellent

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