Question

how are anion formend?​

Answer 1

Explanation:

Anions are the negative ions formed from the gain of one or more electrons. When nonmetal atoms gain electrons, they often do so until their outermost principal energy level achieves an octet.

Answer 2

Answer:

Anions are the negative ions formed from the gain of one or more electrons. When nonmetal atoms gain electrons, they often do so until their outermost principal energy level achieves an octet. ... Under typical conditions, three electrons is the maximum that will be gained in the formation of anions.