If an element has 10 protons and 11 neutrons and 10 electrons, ...

[sc00by25]

If an element has 10 protons and 11 neutrons and 10 electrons, which expression correctly identifies the element?
 
  A) neon-21
  B) neon-11
  C) neon-31
  D) sodium-11
  E) sodium-20

Question 2

What does the following element description actually mean?
 
  iron-57
 
  A) iron with a mass number of 57
  B) iron with an atomic number of 57
  C) iron with 57 protons
  D) iron with 57 neutrons
  E) 57 iron atoms

[macagn]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: A

[sc00by25]

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[macagn]

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