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Author Question: The distinction between an element and an isotope is A) an element has a specific number of both ... (Read 122 times)

olgavictoria

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on: Jul 29, 2018
The distinction between an element and an isotope is
 
  A) an element has a specific number of both protons and neutrons; an isotope has a specific number of protons.
  B) an element has a specific number of neutrons; an isotope has a specific number of both protons and neutrons.
  C) an element has a specific number of protons; an isotope has a specific number of neutrons.
  D) these two words have the same meaning, but element is used by chemists while isotope is used by physicists.
  E) an element has a specific number of protons; an isotope has a specific number of both protons and neutrons.

Question 2

It is 39 trillion miles to the nearest star beyond the sun. Expressed in powers of ten, this is
 
  A) 3.9  1013. B) 3.9  109. C) 3.9  1010. D) 3.9  1012.


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xiazhe

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

E

Answer to Question 2

A


olgavictoria

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Reply 2 on: Jul 29, 2018
Excellent

scottmt

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Reply 3 on: Yesterday
Wow, this really help

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