b) Write a full electron configuration of 82Pb, and a shortham Atom: 1s 2s 2p 3s 3p 3d 1 st ion: 2nd: ion

(a)  Using principles of atomic structure, explain why the first ionization energy of Po is less than that of Se.

What element forms an ion with an electronic configuration of 1s²2s²2p 3s²3p64s²3d¹04p65s²4d¹05p6 (or [Xe]) and a -2 charge? Give the symbol for the element. element symbol:

Consider the following information. • The enthalpy of formation of BaO is AH; = -548.0 kJ/mol. • The enthalpy of sublimation of Ba is AH sub = 180.0 kJ/mol. • The first and second ionization energies of Ba are IE, = 503 kJ/mol and IE2 = 965 kJ/mol. • The first electron affinity of O is AHEA1 = -142 kJ/mol. • The bond energy of O, is BE = 498 kJ/mol. • The lattice energy of BaO is AHjattice = -3029 kJ/mol. Determine the second electron affinity of O. AHEA2 kJ/mol

What is the Electron Configuration of (In the picture)

The following orbital diagram best represents: 5s 4d 0O0 O Mo!+ Mo Nb O Ag 1+

Select the group number. Select the generic outer electron configuration. Ο 1Α (1) O 2A (2) O ns?np' O ns?np? 4A (14) O ns?np³ ns²np* 4 ЗА (13) О 5А (15) О 6А (16) O ns?np5 O ns?np O 7A (17) 8A (18)

9. Compare polarizability (, or =): B Li Te P p3+ I I Compare metallic character (, or =): W Cr Ве Sr 02- Ni2+ Ni3+ Compare ionization energies (, or =): N Te Br CI Na Na+

Write electron configurations of • C, N, O, F, Ne • Be, Mg, Ca • F, Cl, Br • He, Ne, Ar, Kr