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Author Question: How many significant digits are present in the number 0.02560? A) 3 B) 4 C) 5 D) ... (Read 101 times)

jparksx

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on: Aug 27, 2018
How many significant digits are present in the number 0.02560?
 
  A) 3
  B) 4
  C) 5
  D) 6

Question 2

It is relatively easy to pull an electron away from a potassium atom (K, atomic number 19), but very difficult to remove a second one because ________.
 
  A) of the repulsions occurring between electrons within the same shell
  B) the electrons are so very small
  C) of a much greater effective nuclear charge
  D) very little energy remains after the first electron is removed


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shewald78

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

B

Answer to Question 2

C


jparksx

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Reply 2 on: Aug 27, 2018
YES! Correct, THANKS for helping me on my review

Sarahjh

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Reply 3 on: Yesterday
Wow, this really help

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