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Author Question: The ____________________ of a radioactive substance is the amount of time for the substance to be ... (Read 159 times)

naturalchemist

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on: Jul 27, 2018
The ___________________ _ of a radioactive substance is the amount of time for the substance to be reduced by half.
 
  Fill in the blank(s) with correct word

Question 2

A single human cell encloses about 1.5 meters of DNA containing 4.5 billion base pairs. How far apart are these base pairs in the DNA?
 
  a. 3.3 x 10-10 nm
  b. 3.3 x 1010 nm
  c. 3 x 109 nm
  d. 300 nm
  e. 0.34 nm


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xiaomengxian

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

half-life

Answer to Question 2

E


naturalchemist

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


xiaomengxian

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


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