Which electron transition represents a gain of energy?

A. from 2nd to 3rd shell

B. from 2nd to 1st shell

C. from 3rd to 2nd shell

D. from 3rd to 1st shell

the relationship between the heated air particles inside a hot air balloon and the cooler air outside the balloon?

Complete and balance this reaction sulfuric acid reacts with barium chloride

You place a balloon in a closed chamber at standard temperature and pressure. You double the chamber temperature while leaving the pressure constant. What happens to the ballon

After some wood has completely burned in a fire, some of the matter that made up the wood has been destroyed. Is the statement correct or incorrect? Explain. A) It is correct.

Which of the following is true regarding nuclear fission and nuclear fusion? A. Both of these processes can provide energy. B. Our sun's heat is an example of both of these processes. C. Both of these processes are equally complex to control. D.

Biofuel is any fuel that is produced from living or once living matter in a short period of time, days, weeks, or even months.

How are revolution and year related

Read the scientific question below. "Does sunlight make plants live?" What is a likely hypothesis for the question?

A chemist is using a solution of HNO3 that has a pH of 3.75. What is [H+] for the solution?

What is the oxidation number for CO2