Question

in which block of the periodic table is chromium (cr) found?
○ s block
○ d block
○ p block
○ f block

Explanation:

Chromium (Cr) has an atomic number of 24, and its electron configuration is $[Ar] 3d^5 4s^1$. The d - block elements are defined by the filling of the d - orbitals. Since chromium's electron configuration involves the filling of the 3d orbital (even with the special case of electron configuration for stability), it is a transition metal, and transition metals are part of the d - block in the periodic table. The s - block elements have valence electrons in s - orbitals (groups 1 and 2), p - block elements have valence electrons in p - orbitals (groups 13 - 18), and f - block elements are the lanthanides and actinides with filling of f - orbitals, which does not apply to chromium.

Answer:

B. d block