Which atom has an Atomic Number equal to 33?

The atomic number of an element is defined as the number of protons found in the nucleus of its atoms. Therefore, when determining which atom corresponds to an atomic number of 33, you should look for an atom that has 33 protons.

In the context of the choices provided, the option that lists 33 protons accurately reflects this definition. The presence of 33 protons indicates that the atom in question is arsenic, which has an atomic number of 33.

In contrast, the other options either list fewer or more protons, not matching the required atomic number of 33. Therefore, they do not represent the element that possesses an atomic number of 33. Such details are essential for understanding elemental properties in atomic structure and periodicity.