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Author Question: A certain nucleus containing 8 protons and 7 neutrons has a density . Which of the following values ... (Read 72 times)

khang

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on: Jul 29, 2018
A certain nucleus containing 8 protons and 7 neutrons has a density . Which of the following values would be closest to the expected value of the density of a nucleus having 51 protons and 69 neutrons?
 
  A) 1.00
  B) 1.85
  C) 2.00
  D) 2.14
  E) 8.00

Question 2

Suppose the half-life of some element is 2 days. If you purchase 10 grams of the element (which was produced in a laboratory 4 days ago), how much of this element would you have 3 days after you purchased it?
 
  A) more than 2.5 grams but less than 5 grams
  B) 2.5 grams
  C) more than 1.25 grams but less than 2.5 grams
  D) 1.25 grams
  E) less than 1.25 grams


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Kdiggy

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Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

C


khang

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Reply #2 on: Jul 29, 2018
Thank you!


Kdiggy

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Reply #3 on: Jul 29, 2018
Always glad to help...


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