The valence electron of a sodium atom does not sense the full +11 ...

[Caiter2013]

The valence electron of a sodium atom does not sense the full +11 of the sodium nucleus. Why not?
 
  A) There are two non-valence shell electrons shielding the sodium nucleus from sensing it.
  B) There are two inner shells of electrons containing ten electrons shielding the sodium nucleus from sensing it.
  C) Since the +11 charge is spread evenly around the entire spherical surface of the nucleus, the actual force of the charge in any given direction is greatly diminished.
  D) The distance from the nucleus to the loosely held lone valence electron varies greatly over time. So, the average sense of charge from the nucleus is considerably less than +11.

Question 2

Any technology ________.
 
  A) has some risks
  B) should have no risks before being used
  C) has a very high risk of causing certain types of cancer
  D) only has risks when being used without care

[6ana001]

Answer to Question 1

B

Answer to Question 2

A

[Caiter2013]

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[6ana001]

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