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.

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

If one fission reaction of a uranium-235 atom produced two neutrons, how many neutrons would be released if the chain reaction occurred three more times?