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Author Question: Which of the following pairs has the same number valence electrons? A) magnesium and potassium ... (Read 103 times)

lunatika

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on: Aug 27, 2018
Which of the following pairs has the same number valence electrons?
 
  A) magnesium and potassium
  B) lithium and calcium
  C) argon and xenon
  D) phosphorus and tellurium

Question 2

Why is it impractical to burn any fuel in such a way that no nitrogen oxides are formed as combustion products?
 
  A) All fuels contain nitrogen.
  B) Nitrogen oxides form wherever air is exposed to high temperatures.
  C) Much of the energy of combustion comes from the formation of nitrogen oxides.
  D) Plants have come to depend on the nitrogen oxides produced from combustion.


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LP

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

C

Answer to Question 2

B


lunatika

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Reply #2 on: Aug 27, 2018
Thank you!


LP

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Reply #3 on: Aug 27, 2018
Always glad to help...


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