CHAPTER 10
CHEMICAL BONDING I: BASIC CONCEPTS
PRACTICE EXAMPLES
1A
Mg is in group 2(2A), and thus has 2 valence electrons and 2 dots in its Lewis symbol. Ge
is in group 14(4A), and thus has 4 valence electrons and 4 dots in its Lewis symbol. K is in
group
CHAPTER 9
THE PERIODIC TABLE AND SOME ATOMIC
PROPERTIES
PRACTICE EXAMPLES
1A
Atomic size decreases from left to right across a period, and from bottom to top in a
family. We expect the smallest elements to be in the upper right corner of the periodic
tabl
CHAPTER 8
ELECTRONS IN ATOMS
PRACTICE EXAMPLES
2.9979 108 m / s 109 nm
= 4.34 1014 Hz
690 nm
1m
1A
Use c = , solve for frequency. =
1B
Wavelength and frequency are related through the equation c = , which can be solved
for either one.
c 2.9979 108 m / s
=
CHAPTER 7
THERMOCHEMISTRY
PRACTICE EXAMPLES
1A
c
h
The heat absorbed is the product of the mass of water, its specific heat 4.18 J g 1 C 1 ,
and the temperature change that occurs.
heat energy = 237 g
1B
c
h
4.18 J
1 kJ
37.0 C 4.0 C
= 32.7 kJ of heat e
CHAPTER 6
GASES
PRACTICE EXAMPLES
1A
The pressure measured by each liquid must be the same. They are related
through P = g h d Thus, we have the following g hDEG dDEG = g hHg dHg. The gs
cancel; we substitute known values: 9.25 mDEG 1.118 g/cm3DEG = hHg 1