Why does each element have a unique pattern? answer in your own words. be as detailed as needed and include where you found your information

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs