Unlike other members of the IIIA group which are metals, boron is a non-metal because______________?
Show answer Hide answer
Answer: D. all of the above
Explanation
Boron exhibits non-metallic properties due to a combination of distinct atomic and chemical characteristics. Its small atomic size and high nuclear charge create a very high ionization energy value. Boron readily forms covalent molecular addition compounds rather than simple ionic metallic structures. Group thirteen typically contains metallic elements like aluminum, gallium, indium, and thallium. Boron sits at the top of the group and displays metalloid or non-metallic chemical behavior. High electronegativity relative to other group members restricts boron from forming simple cations easily.
Boron chemistry is essential for producing specialized heat-resistant glasses, ceramics, and semiconductor materials. The unique covalent bonding of boron allows it to form complex hydrides and multi-center bonds. Understanding boron helps explain diagonal relationships and periodicity anomalies within the periodic table. While small size contributes significantly, it is only one of multiple factors causing non-metallic behavior. High nuclear charge alone does not fully account for the observed covalent bonding tendencies of boron. Forming addition compounds is characteristic, but correct evaluation requires considering all listed contributing factors.
Related questions
Q1. The azimuthal quantum number specifies___________?
Show answer Hide answer
Answer: C. Angular momentum of an electron
The azimuthal quantum number determines the shape of the electron orbital and angular momentum. It specifies the angular momentum of an electron moving in a particular subshell around nucleus. This quantum number is math...
Q2. Proteins acting as biocatalysts are_________________?
Show answer Hide answer
Answer: A. Enzymes
Enzymes are specialized biological macromolecules composed of amino acid chains that function as catalysts. Biocatalysts accelerate chemical reaction rates inside living organisms without being consumed in the process. P...
Q3. Bromine can be displaced from a KBr solution through treatment with _______________?
Show answer Hide answer
Answer: B. Chlorine
Chlorine is more reactive than bromine and can readily displace it from halide solutions. Halogen reactivity decreases down the group, allowing a higher halogen to displace a lower one. A displacement reaction occurs bec...
Q4. Borax exists as a white crystalline solid and is_________________?
Show answer Hide answer
Answer: B. More soluble in hot water
Borax exhibits endothermic dissolution behavior, making it significantly more soluble in hot water. Heating increases the kinetic energy of solvent molecules, which helps break apart the solute crystal lattice. Solubilit...
Q5. Boron is non-netal whereas A1 is metal. It is due to_______________________?
Show answer Hide answer
Answer: C. Both A and B
Boron possesses a very small atomic radius and a high nuclear charge concentrating positive electrostatic forces. High effective nuclear charge prevents boron from readily losing valence electrons to form positive metall...
Q6. Which technique established the molecular mass of benzene as 78.108 ?
Show answer Hide answer
Answer: B. Vapour density method
The vapour density method measures gas density relative to hydrogen to find molecular mass. Volatile compounds are vaporized, and their density is determined to calculate molar mass accurately. Multiplying the experiment...