What is ioisation?

Answer 1

Never heard of ioisation,

but ionisation is the process by which an atom gets a positive or negative charge by losing or gaining an electron.

Answer 2

Ionization is the process by which an atom or molecule gains or loses electrons, resulting in the formation of charged particles called ions. This process can occur through various means such as exposure to high-energy radiation or collisions with other particles. Ionization plays a crucial role in fields like chemistry, physics, and astronomy.