Atomic emission experiments of a mixture show a calcium line at 422.673 nm corresponding to a transition and a doublet due to potassium 2P3>2 and : 2S1>2 For the sodium 3p 2P3>2 ¡3s 2S1>2 transition, n0 = transitions at 764.494 and 769.901 nm, respectively. a. Calculate the ratio for each of these transitions. b. Calculate for a temperature of 1600°C for each transition.

Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.