g Write the set of four quantum numbers (n, l, ml, and ms) for each of the electrons in a nitrogen (N) atom in the ground state. (Select all that apply.) 1s orbital: (0, 1, 1, +1/2) (1, 0, 0, −1/2) (1, 0, 1, +1/2) (1, 0, −1, −1/2) (1, 1, 0, −1/2) (1, 0, 0, +1/2) (0, 1, 0, −1/2) 2s orbital: (2, 0, 0, −1/2) (2, 0, −1, −1/2) (0, 2, 2, +1/2) (2, 0, 1, +1/2) (2, 1, 0, −1/2) (2, 0, 0, +1/2) (1, 2, 0, −1/2) 2px, 2py, 2pz orbitals: (1, 0, 2, +1/2) (2, −1, 0, −1/2) (2, 1, −1, +1/2) (2, 1, 0, +1/2) (2, 1, 1, +1/2) (2, 1, 2, −1/2) (2, 2, 1, −1/2) How are these sets of quantum numbers in accordance with the Pauli exclusion principle and Hund's rule? If one electron in a particular orbital has ms = +1/2, a second electron in the same orbital will have ms = −1/2 since ---Select--- in an atom can have exactly the same set of four quantum numbers according to the Pauli exclusion principle. In accordance with Hund's rule, the 2px, 2py, and 2pz orbitals need to receive one electron each, so that there will be the ---Select--- number of unpaired electrons. These three electrons should have the same value of ms in order to have parallel spins. If there are more electrons available, the orbitals can then receive the additional electrons.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b