Final answer:
The correct elements for the symbols Na, Cl, He, and S are Sodium, Chlorine, Helium, and Sulfur, respectively.
Step-by-step explanation:
The correct element for the symbols Na, Cl, He, and S are:
- Sodium (Na): Sodium is a highly reactive metal that belongs to the alkali metal group in the periodic table. It has 11 protons, 11 electrons, and 12 neutrons.
- Chlorine (Cl): Chlorine is a nonmetal and a highly reactive element in the halogen group. It has 17 protons, 17 electrons, and 18 neutrons.
- Helium (He): Helium is a noble gas that is known for its low reactivity and density. It has 2 protons, 2 electrons, and 2 neutrons.
- Sulfur (S): Sulfur is a nonmetal element that can be found in various forms, including a yellow solid. It has 16 protons, 16 electrons, and 16 neutrons.