Arrange the points in sequence to draw the geometrical representation of an atom which is represented as ZXA (1) calculation of the number of protons and neutrons. (2) identification of the atomic number and mass number of the given element. (3) placement of the electrons in shells around the nucleus according to the electronic configuration (4) writing the electronic configuration of the atom. (5) protons and neutrons are shown in nucleus.

Options

A. 2, 1, 5, 4,3
B. 2, 1, 3, 4, 5
C. 1, 2, 3, 5, 4
D. 5, 3, 2, 1,4

Explanation

To arrange the points in sequence to draw the geometrical representation of an atom represented as ZXA, follow these steps:

### Step-by-Step Solution:

1. **Identification of the Atomic Number and Mass Number**:
- The atomic number (Z) represents the number of protons in the nucleus of the atom.
- The mass number (A) is the total number of protons and neutrons in the nucleus.

2. **Calculation of the Number of Protons and Neutrons**:
- The number of protons is equal to the atomic number (Z).
- The number of neutrons can be calculated using the formula:
\[ \text{Number of Neutrons} = \text{Mass Number} (A) - \text{Atomic Number} (Z) \]

3. **Protons and Neutrons are Shown in the Nucleus**:
- Draw the nucleus of the atom and represent the protons and neutrons inside it.
- Protons are usually represented as "+" signs, while neutrons can be represented as "n" or simply left blank.

4. **Writing the Electronic Configuration of the Atom**:
- The electronic configuration describes the distribution of electrons in the atom's shells.
- For example, the electronic configuration can be written based on the number of electrons, which is equal to the number of protons in a neutral atom.

5. **Placement of the Electrons in Shells Around the Nucleus According to the Electronic Configuration**:
- Draw concentric circles around the nucleus to represent electron shells.
- Place the electrons in these shells according to the electronic configuration. The first shell can hold up to 2 electrons, the second shell can hold up to 8, and so on.

### Final Arrangement:
The correct sequence to represent the atom geometrically is:
1. Identification of the atomic number and mass number (Step 2)
2. Calculation of the number of protons and neutrons (Step 1)
3. Protons and neutrons are shown in the nucleus (Step 5)
4. Writing the electronic configuration of the atom (Step 4)
5. Placement of the electrons in shells around the nucleus according to the electronic configuration (Step 3)