Chemistry · Periodic trends in properties of elements: atomic and ionic radii, ionization enthalpy, electron gain enthalpy, valence, oxidation states and chemical reactivity
The graph below shows the atomic radii of atoms in picometers \) as a function o
The graph below shows the atomic radii of atoms in picometers \( (\mathrm{pm}) \) as a function of atomic number. Which letter on this graph most closely shows the location of the transition metals of period 5? Atomic Radius vs. Atomic Number
- A. Region E
- B. Region D
- C. Region \( c \)
- D. Region B
Step-by-step solution
Transition metals of period 5 (atomic numbers 39–48) exhibit a gradual decrease in atomic radius across the period, following the sharp drop from the s-block elements (Rb, Sr). On the atomic radius vs atomic number graph, this corresponds to region D, which is after the initial peak and drop, showing the typical trend for d-block elements.