Aseries of lines in the spectrum of neutral li atoms rise from combinations of 1s2 2p1 2p with 1s2 nd1 2d and occur at 610.36 nm, 460.29, and 413.23 nm. the d orbitals are hydrogenic. it is known that the 2p term lies at 67.78 nm above the ground state, which is 1s2 2s1 2s. calculate the ionization energy of the ground-state atom.

Which of the following are guidelines to follow for obtaining accurate observations

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.

1which body contains the majority of the mass in the solar system earth jupiter the moon the sun 2 what keeps the objects in the solar system such as planets orbiting around the sun the force of gravity the galaxy exerts on all objects within it including the solar system the great distance between the sun and the planets the sun's nuclear fusion which acts on each object the gravitational force between the sun and each object in the solar system