Question

the model below shows an atom of an element. what is the atomic number of this atom? 6 8 9 16

Explanation:

Step1: Recall atomic number definition

Atomic number = number of protons (or electrons in neutral atom).

Step2: Count electrons in the model

Count electrons: Inner shell (2) + Outer shell (6) = 8? Wait, no—wait, the electron shells: Let's check the diagram. Wait, maybe the dark and light electrons? Wait, no, in a Bohr model, electrons are the small dots. Wait, looking at the diagram: inner orbit (closer to nucleus) has 2 electrons? Wait, no, the inner circle (first shell) has 2? Wait, no, the diagram: the inner orbit (smaller circle) has 2 electrons? Wait, no, let's count again. Wait, the electron dots: on the inner circle (first shell) – 2? Wait, no, the image: the inner orbit (closer to nucleus) has 2 electrons? Wait, no, maybe the dark and light are protons/neutrons? Wait, nucleus has protons (dark) and neutrons (light). Then electrons: count the dots on the orbits. Let's see: the inner orbit (smaller circle) has 2 electrons? Wait, no, the diagram: the inner circle (first shell) has 2? Wait, no, looking at the image: the inner orbit (closer to nucleus) has 2 electrons? Wait, no, maybe I miscounted. Wait, the electron shells: first shell (n=1) can hold 2, second (n=2) 8, but in the diagram, the inner orbit (first shell) has 2? Wait, no, the dots: let's count all electron dots. Let's see: the inner circle (smaller) has 2 electrons? Wait, no, the image: the inner orbit (closer to nucleus) has 2? Wait, no, maybe the dark and light electrons? Wait, no, the problem: the atomic number is number of protons (which equals number of electrons in neutral atom). Wait, nucleus: protons (dark) and neutrons (light). Let's count protons: how many dark spheres? Let's see, nucleus has, say, 8 protons? Wait, no, the electrons: count the electron dots. Let's look at the orbits: the inner orbit (smaller circle) has 2 electrons? Wait, no, the diagram: the inner orbit (closer to nucleus) has 2? Wait, no, maybe the electron dots: on the inner circle (first shell) – 2, on the outer circle (second shell) – 6? Wait, no, total electrons: 2 + 6 = 8? Wait, no, the image: let's count the electron dots. Let's see: the inner orbit (smaller) has 2 (one at top, one at bottom), and the outer orbit (larger) has 6 (left, right, top, bottom, and two sides). Wait, total electrons: 2 + 6 = 8? Wait, no, maybe I'm wrong. Wait, atomic number is number of protons, which equals number of electrons in neutral atom. So if electrons are 8, then atomic number is 8. So the answer is 8.

Answer:

8 (Option: 8)