Ch
2 & 3 Review Sheet Answers (from Review Sheet Given in Class)10pm 5/13
1
They are isotopes.
2.
7
3. eight neutrons
4.
4
5. 1
6.
1
7. 5
8.
2
9.) carbon, hydrogen, nitrogen, and oxygen
10.
outer shell electrons are shared by two atoms so as to satisfactorily fill the
outer electron shells of both
11.
a hydrogen bond
12.
hydrogen bonds
13. versatility as a solvent
14. the attraction between the H of one water molecule and the O of
another water molecule
15.
gastric juice at pH 2
16.
15 protons. 15 electrons. .
17.
4
18.
16
19
S
20.
14 silicon
21
iodine
22
H-0
23
one of the atoms sharing electrons is much more electronegative than the other
atom.
24
ionic
25
chlorine gains an electron from sodium.
26
7
27
eight neutrons.
28
has 8 electrons in the outer electron shell &
is inert.
29
an isotope.
30
8 protons. & 8
electrons.
31
They form covalent bonds in aqueous solutions. &
They are particularly stable and unreactive
32
atomic number.
33
molecules
34
Each hydrogen atom has a partial positive charge.
35
4
36
2 more neutrons than carbon 12.
37
nonpolar covalent bonds.
38
number of neutrons
39
electrons in the outer valence shell in the atom.
40
protons and neutrons.
41
be particularly stable and nonreactive
42
carbon, hydrogen, nitrogen, oxygen
43
ions
44
outer shell electrons are shared by two atoms so as to satisfy the outer
electron shells of both.
45
They all have unpaired electrons in their valence shells.
46
covalent hydrogen ionic polar covalent
47
There is no clear distinction because the two sciences are parts of same whole.
48
reactions continuing with no effect on the concentrations of react and products
49
The solution is neutral &The concentration of H+ ions is 10-7 moles per
liter.
50 destabilized and
hydrogen bonds are broken.
51 hydrogen bonds
52 a hydrogen
bond
53
hydrogen bonds
54
gasoline
55
versatility as a solvent
56
the bond between the H of one water molecule and the 0 of another water molecule
57
gastric juice at pH 2
58
seawater at pH 8
59
1000 times more
60
releasing H+ in basic solutions.
61 Compared to
most liquids, the evaporation of water requires a large amount of heat.
62
All are properties related to hydrogen bonding.
63
1 x 10-9 moles of hydroxide ion per liter of lake water &
9.0 molar with regard to hydroxide ion concentration
64
tends to prevent great fluctuations in pH.
65
concentration of H+ has increased to 10 times what it was at pH
66
All are properties related to hydrogen bonding
67
tend to maintain a relatively constant pH.
68
the amount of heat energy required to raise one kilogram of water one degree
Celsius
69
4'C
70 release of heat by formation of
hydrogen bonds
71
the water molecule is shaped something like a right angle.
the water molecule is polar. the oxygen atom in a water molecule is
weakly negative. the hydrogen atoms in a water molecule are weakly positive.
72
Hydrogen bonds keep the molecules of ice farther apart than in liquid water.
73
four
74
cohesion adhesion surface tension
75
the formation of hydrogen bonds releases heat.
76
hydrogen
77 absorption and release of heat
when hydrogen bonds break and form
78
Dissolve 180 g of glucose in water, and then add more water until total volume
of the solution is one liter.
79
hydrogen bonds
80
B
81 E
82D