Number of protons is same as the atomic number and number of neutrons is equal to the subtraction of the atomic number from the mass number i.e.
number of neutrons = atomic number - mass number
Now, the atomic number = [tex]17[/tex] = number of protons
[tex]18 = 17 - mass number[/tex]
mass number = [tex]18+17[/tex]
= [tex]35[/tex]
Thus, the element is chlorine.
Name of the element is Chlorine-35.
