Nitrogen-7 configuration

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

How many neutrons does a atom of cobalt have?