Question

Based on electron affinity predict whether BF3 is ionic or covalent​

Answer 1

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Answer:

Boron trifluoride (BF3) is a covalent compound

BF3 is a molecule consisting of an sp2 hybrid of Boron covalently bonded with 3 atoms of fluorine. The covalent bond tells us that electrons are shared, rather than lost by boron and gained by fluorine. This bond is formed because of Boron's high ionization energy.

Boron trifluoride is the inorganic compound with the formula BF3. This pungent colourless toxic gas forms white fumes in moist air. It is a useful Lewis acid and a versatile building block for other boron compounds.

The simplest answer is that both atoms are small, therefore they make very strong covalent bonds.Accordingly, if BF3 is in a suitable solvent, it gain more covalent energy by having a lone pair bind with the boron. BF3 in ether has the ether bound to the boron.

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Answer 2

Answer:

BF₃  is a covalent compound.

Explanation:

Covalent bond is formed by sharing of an electron pair between the same charged species.

Electron affinity is defined as the change in energy of an atom  when an electron is added to form a negative ion.

Halogens like fluorine has high electron affinity and easily forms bond to complete its octet.

Answer 3

Based on electron affinity, it is predicted that Boron trifluoride ($BF_{3}$) is a covalent compound.

• Boron trifluoride $(BF_{3})$ is a compound which is predicted to be covalent because boron in the compound is bonded with three atoms of fluorine and also $BF_{3}$ is $Sp^{2}$ hybridized.
• The covalent bond is formed when there occurs the sharing of the electrons and not when the electrons are either lost or gained.
• Due to high ionization energy of the boron, the covalent bond is formed. Boron requires to lose three electrons to attain a noble gas configuration but it will not be able to do it because very high energy is required for it.

• Thus, boron is not able to lose any electron to its corresponding atom fluorine.  

Hence, Boron trifluoride ($BF_{3}$) is a covalent compound.