excited sodium atoms emit light in the infrae at 589 nm. What is the energy of a single photon with this wavelength

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

What effect might melting sea ice have for people who live in coastal areas?