Answer:
Explanation:
oxygen is a 15 and nitrogen science chemistry i'm guessing
Answer:
Rb: [Kr] 5s
Step-by-step explanation:
Rb is element 37, the first element in Period 5.
It has one valence electron, so its valence electron configuration is 5s.
The noble gas configuration uses the symbol of the previous noble gas as a shortcut for the electron configurations of the inner electrons.
The preceding noble gas is Kr, so the electron configuration is Rb: [Kr] 5s.
Answer:
Noble gases have a complete valence electron shell making them stable and nonreactive.
Explanation:
heating is repeated to ensure all water molecules have evaporated