A neutrino is a particle released during nuclear fusion. It has less mass than an electron. What properties would a neutrino exhibit?

Suppose an electron in an atom drops from energy level 4 to energy level 2. What happens to the lost energy?

What is dark matter?  What is one observation as evidence that dark matter should exist?  Explain.  No credit for single word responses.

According to the quantum model, which of the following best describes an electron in an atom?

A positively charged particle in the nucleus of an atom is a . A particle of light is a .

What is cosmic inflation?

How can we know the Sun’s atmosphere contains neon vapor?

According to General Relativity, what is gravity?

Suppose an electron in an atom jumps from energy level 2 to energy level 4. Where does the extra energy come from?

According to experiment, which interpretation correctly describes the fundamental nature of reality?