What is the identity of the atom shown? A) Fluorine B) Neon C) Nitrogen D) Potassium 15 POINTS
The Correct Answer and Explanation is:
The atom shown in the image is B) Neon.
How to Identify the Atom:
To identify the element, we must count the number of protons, as the number of protons (positive charges in the nucleus) determines the atomic number, which uniquely identifies the element.
Step 1: Count the Protons
- In the nucleus (center of the atom), the red circles with “+” symbols represent protons.
- Count the number of red “+” symbols. There are 10 protons.
An atom with 10 protons is the element Neon (Ne), which has an atomic number of 10.
Step 2: Check the Electrons
- The orange circles on the outer rings with “−” symbols represent electrons.
- There are 10 electrons: 2 in the inner shell and 8 in the outer shell. This is the correct electron configuration for a neutral Neon atom: 2, 8.
This confirms the atom is neutral (same number of protons and electrons) and matches Neon.
Why Not the Other Choices?
- A) Fluorine has 9 protons and 9 electrons → Not a match.
- C) Nitrogen has 7 protons and 7 electrons → Not a match.
- D) Potassium has 19 protons and 19 electrons → Too many protons/electrons.
Additional Notes (Context):
Neon is a noble gas, located in Group 18 of the periodic table. It is chemically stable due to its full outer electron shell (2 in the first, 8 in the second). That’s why Neon rarely forms compounds under normal conditions. Its stability and unreactive nature make it ideal for uses in neon lighting and signs.
Final Answer:
B) Neon ✅
