How many electrons are in a full valence shell?

6

8

4

8

Explanation:

cause the first shell can hold up to 2 electrons the second shell holds upto 8 electrons

Answer:8

Explanation:Octet rule: A rule stating that atoms lose, gain, or share electrons in order to have a full valence shell of 8 electrons. (Hydrogen is excluded because it can hold a maximum of 2 electrons in its valence shell