Answer : The number of atoms of fluoride present in one molecule of
are, 3.
Explanation :
Molecule : It is defined as the smallest particle in an element or a compound which has chemical properties of that element or a compound.
Molecules are made up of atoms and the atoms are bonded by the sharing of electrons.
The given molecules is,

The nitrogen trifluoride molecule is made up of two elements which are nitrogen and fluorine.
In the given molecules
, there are 1 nitrogen atom and there are 3 fluorine atoms.
Hence, the number of atoms of fluoride present in one molecule of
are, 3.