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4 votes
All elements in a period have the same energy level due to which of the following reasons?

a. The same atomic number
b. The same number of neutrons
c. The same number of electrons
d. The same number of elctron shells

1 Answer

5 votes
All elements in a period have the same energy level due to The same number of electron shells. The answer is letter D. The rest of the choices do not answer the question above.
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User Victor Wong
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