Chapter 8 - Electron Configuration and Electron Periodicity

Electrostatic phenomena

________, such as the attraction of opposing charges and the repulsion of similar charges, play a significant influence in defining the energy states of many- electron atoms.

Helium

________ (He; Z= 2) is the next element after hydrogen, and it is the first element with atoms that have more than one electron.

spin quantum number

The ________ (ms) has two possible values that correspond to the two orientations of the electron's magnetic field, +1 /2 or- 1 /2.

Wolfgang Pauli

The Austrian physicist ________ established a concept that specifies the arrangement of electrons in orbitals in atoms with more than one electron based on observations of excited states:

fourth quantum number

A(n) ________ describes spin, which is a characteristic of the electron rather than the orbital.

Dmitri Mendeleev

________, a Russian scientist, organized the 65 elements known at the time into a table and described their behavior in the periodic law in 1870: when the elements are ordered by atomic mass, they display a periodic recurrence of identical qualities.

Pauli exclusion principle

________: no two electrons in the same atom can have the same four quantum numbers.

Moseley

________ discovered that the greatest x- ray peak for each metal was connected to the nuclear charge, which rose by one with each subsequent element.

quantum numbers

The three ________ n, l, and ml, respectively, represent the size (energy), shape, and orientation in space of an atomic orbital.