Question

n atom of an element is shown by the model.

A gray circle is surrounded by 4 concentric circles. The innermost circle has gray dots at the north and south positions; the second ring has 8 equally spaced dots, aligning with the inner ring at north and south; the third ring has 14 dots, equally spaced, aligned with the other rings at north and south; the outer ring has dots at north and south.

How is this model useful?
It shows how electrons are distributed in the shells of an iron atom.
It shows how electrons are distributed in the shells of a cobalt atom.
It shows how orbitals are distributed in the shells of an iron atom.
It shows how orbitals are distributed in the shells of a cobalt atom.

Answer 1

It shows how electrons are distributed in the shells of an iron atom.

Explanation: the rings show 2 + 8 + 14 + 2 = 26 electrons, which is atomic number 26 (iron). This is a Bohr-style shell diagram (electron shells), not an orbital diagram.