Question

multiple-choice question
are element #2 & #4 the same element?
no because they have a different number of electrons
yes because they have the same number of protons
rewatch

Explanation:

The identity of an element is uniquely determined by the number of protons (atomic number) in its nucleus. Electrons can vary (forming ions) without changing the element type, but matching proton counts mean the elements are the same.

Answer:

Yes because they have the same number of protons