Download Chemistry TEST 4 Review and Answers

Chemistry TEST 5 Review and Answers
Chapter 5 Electrons in atoms and Chapter 6.3 Periodic Trends
TEST DAY: Friday, October 23, 2009
Consult class notes, activities, homework, and notes.
Page 165 – 171 and 197 – 203 in textbook
5.1 Wave and Particle characteristics of Light
35
x rays , ultraviolet light, microwaves, radio waves
37
Phenomenon in which a metal emits electrons when light of a certain frequency shines on it
41
Red waves have longer wavelength and lower frequency
λ=6.00x10-5 m; infrared radiation (use c=λν; c = 3.00x108 m/s)
46
E = 2.97x10-19 J
(use E=hν; h = 6.626x10-34 J·s)
51
5.2 Quantum theory of the atom
61
Ground state – lowest energy; excited state – any energy state higher than ground state
63
3 dimensional region around nucleus where an electron is most likely to be found
70
2 electrons
5.3 Electron configuration and orbital diagrams
82
Pauli exclusion principle, aufbau principle, Hund’s rule
83
Oxygen: 1s2 2s2 2p4
Sulfur: 1s2 2s2 2p4 3s2 3p4
85
orbital diagrams – you’re on your own
a. 1s2 2s2
c. 1s2 2s2 2p3
b. 1s2 2s2 2p4 3s2 3p1
d. 1s2 2s2 2p4 3s1
orbital diagrams – you’re on your own
6.3 Periodic trends
58
The energy needed to remove an electron from a neutral atom in its gaseous state
63
Atomic radii decrease left-to-right because the nuclear charge increases as the shielding of
inner core electrons remains constant. The increased attraction of the nucleus for its
electrons pulls the electrons inward, resulting in a decreased atomic size.
64
a. N; b. Ne; c. Li
65
Hydrogen and helium have a complete energy level with just two electrons (The first energy
level is the 1s orbital, which holds a maximum of 2 electrons)
66a, b
a. Ion is negative because the atom becomes smaller than neutral atom. b A is left of B –
atomic radius in period decreases from left-to-right.
67
Group 1 has 1 electron (alkali metals); group 18 has 8 electrons (noble gases)
78
a. As; b. N; c. Be