Answer :
Final answer:
The radius of an atom of Mn (manganese) is 1.27 Å, falling within the expected range for transition metals and aligning with its position in the periodic table.
Explanation:
The question asks, "What is the radius of an atom of Mn?" and provides four options: a) 1.27 Å, b) 1.69 Å, c) 2.84 Å, d) 3.21 Å. To answer this, we should understand that the atomic radius is a measure typically given in angstroms (Å) or picometers (pm), representing the size of an atom from its nucleus to the outer boundary of its electron cloud. The atomic radius of an element is influenced by its position in the periodic table; as you move down a group, the atomic radius increases due to the addition of electron shells.
For manganese (Mn), its atomic structure has electrons arranged in such a manner that it doesn't have an exceedingly large nor small atomic radius in comparison with other transition metals. Based on reference values for atomic radii, the correct answer is a) 1.27 Å. This value falls within the expected range for transition metals like Mn, which are known to have moderately sized atomic radii when compared to the entire periodic table.
