Textbook Question
Group 1A and 2A elements are sometimes called, collectively, “the s-block.” Therefore, what is an analogous name for the entire collection of the group 3A, 4A, 5A, 6A, 7A, and 8A elements?
2. Atoms & Elements
Periodic Table: Representative Elements & Transition Metals
Multiple Choice
In which block of the periodic table is chromium (Cr) found?
A
s block
B
f block
C
d block
D
p block
Verified step by step guidance1
Recall that the periodic table is divided into blocks based on the electron configuration of the elements, specifically which atomic orbitals are being filled with electrons.
The s block includes groups 1 and 2, where the outermost electrons enter s orbitals.
The p block includes groups 13 to 18, where the outermost electrons enter p orbitals.
The d block consists of transition metals, where the outermost electrons enter d orbitals. These elements are found in groups 3 to 12.
Chromium (Cr) has an electron configuration that ends in 3d electrons, placing it in the d block of the periodic table.
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