Question

What is the valency of boron in ${\mathrm{BF}}_3$ molecule?

Answer 1

Valency

• The valency of an atom refers to its ability to combine with other atoms.
• The valency of an element determines the number of bonds that an atom can make as part of a complex.
• The electrons in the atom's outermost orbit are referred to as valence electrons.

Valency of boron in ${\mathrm{BF}}_3$ molecule

• The ${\mathrm{BF}}_3$ molecule has a trigonal planar structure and is non-planar.
• The atomic number of Boron is $5$.
• Boron's electrical configuration can be represented as $\mathit{1}{s}^{\mathit{2}}\mathit{2}{s}^{\mathit{2}}\mathit{2}{p}^{\mathit{1}}$
• As a result, the valency of the boron is $3$.
• The valence electrons in the Lewis structure of ${\mathrm{BF}}_3$ are 3 from boron and $21(3\times 7)$ from fluorine atoms.