Final answer:
Chlorine, with the chemical symbol Cl, has 17 protons, typically 18 neutrons for its most common isotope, 17 electrons, an atomic number of 17, and isotopic atomic masses of 35 amu and 37 amu. The electron configuration of a neutral chlorine atom is 3s23p5.
Step-by-step explanation:
To complete the table for the element Chlorine (Cl), we need to provide the number of protons, neutrons, electrons, the atomic number, and the atomic mass. Chlorine has an atomic number of 17, which means it also has 17 protons and, in a neutral state, 17 electrons. The most common isotope of Chlorine has 18 neutrons (35Cl) comprising 75.77% of natural chlorine, and another isotope has 20 neutrons (37Cl) accounting for the remaining 24.23%. Therefore, the atomic masses are 35 amu and 37 amu respectively.
The electron configuration of a neutral chlorine atom is 3s23p5, reflecting its position in the third period and Group 17 (halogens) of the periodic table. Since Chlorine's atomic number is 17, the proton count is the same. For neutrons, you would select either 18 or 20 based on the isotope in question, and the atomic mass is the weighted average of the isotope masses.