If you wanted to make a crucible for melting sodium (Na), which metal would be most suitable for that purpose

In which situation can a mixture always be called a solution

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules