Final answer:
The helium atom has an atomic number of 2, which means the part of the helium atom that represents a proton is option b. 2.
Step-by-step explanation:
The part of the helium atom that represents a proton is given by the option b. 2. A helium atom, represented by the symbol He, has an atomic number of 2, which indicates that it contains two protons in its nucleus. This is in line with the basic atomic structure where the number of protons defines the element and its placement on the periodic table. Helium is known for its stability and is the second lightest and second most abundant element in the observable universe. The proton is represented by the number 2 in the helium atom. Helium has an atomic number of 2, which indicates the number of protons in its nucleus. Each proton has a positive charge and is located in the nucleus of the helium atom.