Chemistry · Periodic trends in properties of elements: atomic and ionic radii, ionization enthalpy, electron gain enthalpy, valence, oxidation states and chemical reactivity
Which element has the most metallic character?
Which element has the most metallic character?
- A. Boron
- B. Aluminium
- C. Indium
- D. Thallium
Step-by-step solution
Metallic character increases down a group in the periodic table. In Group 13, the order of metallic character is B < Al < Ga < In < Tl. Thallium, being at the bottom, has the largest atomic size and lowest ionization enthalpy among the given options, making it the most metallic.
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