consider only electron transitions involving the n = 1 through n = 4 energy levels for the hydrogen atom. how many emission lines are possible, considering only these first four quantum levels?

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

answer: i dont know the answer but this might

explanation:

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