Boron Is non-metal whereas Al is metal, it is due to
Correct answer: C. Both a and b
- A. Small size
- B. High nuclear charge
- C. Both a and b
- D. No authorized justification yet
Explanation
Combining the effects of small size and high nuclear charge provides a more complete explanation. The smaller size of Boron makes its valence electrons closer to the nucleus, already experiencing a stronger pull due to the higher nuclear charge. This combination makes it energetically unfavorable for Boron to lose these electrons and form the delocalized electron cloud characteristic of metals.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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