Answer: The chemical symbol of the compound formed is
or
![NaCl](https://img.qammunity.org/2022/formulas/chemistry/high-school/cwxt9l7xnr9v3khdb0inidqdkhyamoq6rz.png)
Step-by-step explanation:
An ionic compound is formed when the complete transfer of electrons takes place from one element (usually metals) to another element (usually non-metals).
The element losing electron (metal) forms a positive ion known as a cation while the element gaining electron (non-metal) forms a negative ion known as an anion.
Element X has the atomic number 11 which is sodium. The electronic configuration of it is
![1s^22s^22p^63s^1](https://img.qammunity.org/2022/formulas/chemistry/high-school/do0qxz129imjd6wy2y01mj1r6zaqsbhlvw.png)
This element will lose 1 electron to form
ion of
![Na^+](https://img.qammunity.org/2022/formulas/chemistry/high-school/6oxkegjqn6mzbvqashyw10lqy8737gr9ly.png)
Chlorine has the atomic number 17. The electronic configuration of it is
![1s^22s^22p^63s^23p^5](https://img.qammunity.org/2022/formulas/chemistry/high-school/35ei3z3i835wbqfop956nzt8x03cxkzdr1.png)
This element will gain 1 electron to form
ion
When these two ions combine, they lead to the formation of an ionic compound having a chemical formula of
or
![NaCl](https://img.qammunity.org/2022/formulas/chemistry/high-school/cwxt9l7xnr9v3khdb0inidqdkhyamoq6rz.png)
Hence, the chemical symbol of the compound formed is
or
![NaCl](https://img.qammunity.org/2022/formulas/chemistry/high-school/cwxt9l7xnr9v3khdb0inidqdkhyamoq6rz.png)