Calculate the energy gap between the excited and ground states for the sodium ion.

Iknow #2 is d. i just need to know why

List four observations that indicate that a chemical reaction may be taking place

Type the correct answer in the box. spell all words correctly.what is the correct term for living the most sustainable life you can within your current circumstances? when your are being as sustainable as you can within your current lifestyle, you are said to be sustainability.