How do atoms usually combine? in a way that increases the number of valence electrons. in a way that decreases the number of valence electrons. in a way that makes each atom less stable. in a way that makes each atom more stable.

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

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?

What is happening when the water inside a kettle heats up and begins to boil