Cations are elements with a positive charge (loose electrons to have a full outer shell
-cations are usually metals ( groups 1234)
Anions are element with a negative charge (gain electrons to have a full outer shell)
-anions are usually non-metals ( groups 567)
Cosmic background radiation is leftover thermal energy from the Big Bang.
Answer: It’s important because people go to the doctor when they don’t feel good, and sometimes it’s a virus, and sometimes it’s just bacteria.
This is the balanced equation H2+Cl3 -> 2HCl.