Write the electron configuration for the element with atomic number 82. Draw the orbital diagram of its valence electrons and give the set of quantum numbers to describe each valence electron.

When more than one electron exists in an atom, the energy levels (n) split into sub-levels (s, p, d, f orbitals have different energies—even at the same n level). How electrons exist in these orbitals changes the properties of atoms. Electron configurations are either written in electron configuration notation or as an orbital diagram (boxes corresponding to orbitals of increasing energy). Write the ground state electron configuration and corresponding orbital diagram for each ion or neutral atom below. Do not use noble gas abbreviations for period 1, 2 or 3 elements.

Describe the periodic trends for Atomic Radius and Ionization Energy. Define them and describe the trends as you move from left to right in a period and top to bottom in a group on the periodic table.

Predict the electron configuration for the C atom:    Predict the electron configuration for the P atom:   Predict the electron configuration for the V atom:     Predict the electron configuration for the Sb atom:     Predict the electron configuration for the Sm atom:   Predict the electron configurations of N3–    Predict the electron configurations of Ca2+   Predict the electron configurations of S2–   Predict the electron configurations of Cs1+     Predict the electron configuration of Cr2+     Predict the electron configuration of Gd3+