Answer:
Each helium atom has a full valence electron shell, but each hydrogen atom only has one valence electron.
Explanation:
Answer:
Each helium atom has a full valence electron shell, but each hydrogen atom only has one valence electron. Explanation: ... H has one electron in the outer shell therefore its reactive by gaining or losing the outermost electron. therefore H is more reactive than He as it has an incomplete valence electron shell.
Explanation:
