They are known as “American Central”
Stoichiometry is not really hard if you are good with your numbers. All you have to do is pay close attention and follow you teacher because if you don't you will end up like me not knowing what you are doing. Listen and pay real close attention and I can guarantee you it will be just fine!
Your answer to your question is: 1s² 2s² 2p⁶
What are the answer choices?
