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Determine the bonding type for boron trihydride given the electronegativity on the Pauling scale for boron is 2.0 and for hydrogen is 2.1.

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Answer: The bond between boron and hydrogen in boron trihydride is covalent bond.

Step-by-step explanation:

The type of bonding between the atoms forming a compound is determined by using the electronegativity difference between the atoms. According to the pauling's electronegativity rule:

  • If
    \Delta \chi=0, then the bond is non-polar.
  • If
    \Delta \chi\leq 1.7, then the bond will be covalent.
  • If
    \Delta \chi>1.7, then the bond will be ionic.

We are given:

Electronegativity for boron = 2.0

Electronegativity for hydrogen = 2.1


\Delta \chi=\chi_(H)-\chi_(B)\\\\\Delta \chi=2.1-2.0=0.1

As,
\Delta \chi is less than 1.7 and not equal to 0. Hence, the bond between boron and hydrogen is covalent bond.

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