객관식
Which of the following best describes the properties of metalloids on the periodic table?
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2. Atoms & Elements
Periodic Table: Classifications
객관식
In which block of the periodic table is uranium (U) found?
A
s block
B
f block
C
d block
D
p block
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검증된 단계별 안내1
Recall that the periodic table is divided into blocks based on the electron configuration of the elements, specifically which subshell is being filled with electrons: s, p, d, or f.
Identify the atomic number of uranium (U), which is 92, and consider its electron configuration to determine which subshell is being filled last.
Understand that the f block corresponds to the filling of the 4f and 5f orbitals, which are characteristic of the lanthanides and actinides series respectively.
Recognize that uranium is an actinide element, meaning it is part of the series where the 5f orbitals are being filled.
Conclude that since uranium's electrons are filling the 5f subshell, it belongs to the f block of the periodic table.
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