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Subject Test Chemistry

Question 10 of 13

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SAT Subject Test

The set of lettered choices below refers to multiple questions. Select the one lettered choice that best fits each statement or answers each question. A choice may be used once, more than once, or not at all in each set.

Has electrons in f orbitals

Select an Answer

text Ar end text

Correct Answer: 
No

text O end text

Correct Answer: 
No

text S end text

Correct Answer: 
No

text Ti end text

Correct Answer: 
No

text U end text

Correct Answer: 
Yes

The element with the lowest atomic number that has any electrons in an f orbital is cerium (atomic number 58), which has the electron configuration left square bracket text Xe end text right square bracket 4 f text end text to the power of 1 end exponent invisible times 5 d text end text to the power of 1 end exponent invisible times 6 s text end text to the power of 2 end exponent. All elements with an atomic number equal to or greater than 58 have ground-state atoms with electrons in f orbitals. Uranium has an atomic number of 92; therefore the correct answer is (E).

Question Difficulty: 
easy