Answer: The ion formed is

Step-by-step explanation:
An ion is formed when an atom looses or gains electron.
- When an atom looses electrons, it will form a positive ion known as cation.
- When an atom gains electrons, it will form a negative ion known as anion.
We are given:
Atomic number of element Z = 20
The electronic configuration of neutral atom =

The electronic configuration of the ion =

As, the given element is loosing 2 electrons. So, it will form a positive ion having charge of +2.
Hence, the ion formed is
