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Author Question: Elements in the same period have A) the same atomic number. B) the same number of neutrons. C) ... (Read 165 times)

melly21297

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on: Aug 27, 2018
Elements in the same period have
 
  A) the same atomic number.
  B) the same number of neutrons.
  C) the same number of valence electrons.
  D) none of the above

Question 2

How long will it take for a 5.0 g tritium sample to decay down to 0.313 g? The half-life of tritium is 12 years.
 
  A) 12 yrs
  B) 24 yrs
  C) 48 yrs
  D) 96 yrs


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reversalruiz

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

D

Answer to Question 2

C


melly21297

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Reply #2 on: Aug 27, 2018
Both answers were spot on, thank you once again


reversalruiz

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Reply #3 on: Aug 27, 2018
Great! Please up vote :D


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