Which of the following orbital diagrams represent the valence electrons for oxygen? a. b. C. d I

Atoms of which group in the periodic table have a valence shell electron configuration of ns2np2?

Sketch the px and dxz orbitals. Be sure to show and label the coordinates.

Explain why Al is a member of group 13 rather than group 3?

How are the electron arrangements in a given group (vertical column) of the periodic table related? How is this relationship manifested in the properties of the elements in the given group?

a Write the complete ground state electron configuration for the scandium (Z=21) atom. b Use a noble gas core to write the electron configuration of iron.

Write the orbital diagram tor an atom of (a) Na (b) O (c) Co (d) Cl

An unknown element is a nonmetal and has a valence-electron configuration of ns2np4 . How many valence electrons does this element have? . Possible identities for this element include which of the following? msp;CL,S,Pb,Se,Cr

How many valence electrons does each of the following atoms have? rubidium, Z=37 c. aluminum, Z=13 arsenic, Z=33 d. nickel, Z=28

Describe the general characteristics of the first (lowest-energy) hydrogen atomic orbital. How is this orbital designated symbolically? Does this orbital have a sharp “edge"? Does the orbital represent a surface upon which the electron travels at all times?