Question

A molecule of a covalent compound contains three atoms of fluorine (F) and one atom of boron (B).

Answer 1

The correct molecular formula  and chemical name of compound  that contain   3 atom of fluorine and one atom of Boron is

BF3 - Boron  trifluoride

Explanation

writing the formula

when writing the chemical formula of a compound,   the cation   symbol is written first followed by anion name.  Boron (B) is the cation hence its symbol is written first followed by  fluorine (f)-  the anion). since there are three atoms of fluorine three is written at the end of F hence

naming the chemical compound

while naming the chemical compound  again the cation is named first then anion. The ending of the second name ( fluorine) is replaced with ide, hence the name fluoride. Prefix tri  is used to show that  the number of fluoride are  three, hence the name  boron trifluoride