Multiple Choice
Does a shell have to contain electrons in order to exist?
A) A shell is a form of energy that requires electrons in order to exist.
B) A shell is just a region of space which may or may not contain electrons.
C) A shell is just a conceptual model,hence,it doesn't really exist with or without the electron.
D) Two of the above are reasonable answers.
Correct Answer:

Verified
Correct Answer:
Verified
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