Concept:The mass number is the sum of protons and neutrons, while the atomic number equals the number of protons.
Explanation:For a neutral atom, the number of electrons equals the number of protons.
Atom W has 17 electrons, so it has 17 protons.
Thus, the atomic number is
17.
The mass number is the total number of protons and neutrons:
17+18=35.
In nuclear notation, the mass number is written as the superscript and the atomic number as the subscript.
Therefore, the correct representation is
1735W.
Answer:C.
1735W