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Chemistry Final
What is electron affinity?
Avagadro's number
Chemistry Final
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1
Avagadro's number
6.02 x 10^23
6.02x 10^22
5.02x 10
2
What is electron affinity?
Energy required to remove an ion or electon
measure of the ablility to attract electrons
3
How many sig figs in 200.
2
3
1
4
C= wavelength x frequency
True
False
5
Polyatomic ions are a charged group of cavalently bonded atoms.
False
True
6
Basic research
analytical chem
physical chem
theoretical chem
7
What is bond energy?
Energy to break bonds
energy to make bonds
8
What is potential energy?
what experiements end with
What all experiments begin at
has matter
9
Definition of polyatomic ion
Two molecules with two charges
Two or more molecules combined for one charge ex: NO3
Ex: oxygen
10
What is a molecule?
Sea of electrons
neutral group of atoms held by covalent bonds
groups 14-17 including H
11
Extensive Physical Property
not depends on matter
depends on matter
12
What is the difference between diffusion and effusion?
Diffusion happens in water. Effusion happens in gas.
Diffusion happens in solids. Effusions happen in gas.
Diffusion happens in gas. Effusion happens in liquids
13
What is the unit for density?
cm^3
g/cm^3
J
g
14
Relationships between substances
physical chem
inorganic chem
organic chem
15
Qualitative Info
involves numbers
apperance, feeling
16
Electrolysois
physical change
chemical change
17
Definition of atoms
Smallest unit of element or compound
Largest unit of element
Smallest unit of measurement
18
Alkali Metals are in group
4
1
3
2
19
Distillation
chemical change
physical change
20
Will the reaction Cd+ HCL occur?
No
Yes
21
Example of Heterogenous mixture
air
soil
22
How many sig figs in 140?
3
2
1
23
What is a photon?
a particle of light
light travel
electron
24
Atoms that have the s and p sublevels of their highest main energy level filled have _electrons in the main energy level
3
9
8
10
25
Ionization energy decreases ______ a group on the PT
down
up
26
What is another name for nuclide?
electron
Isotope
proton
27
Bond links is the distance between two bonded atoms at their ______.
minimal distance
distance
maximum force
28
If water molecules were no polar, water would probably be a __________.
Gas
Solid
Liquid
29
Electrons in n=3 squared =
18 orbitals x 2 electrons
9 orbitals
9 orbitals x 2 electrons = 18 electrons
30
What is the Pauli Exclusion Principle?
electron occupies lowes energy level
energy required to move an electron or ion
No two electrons can have the same four quantum numbers
31
What is average atomic mass
another name of nuclide
number of protons
The average weight of all the isotopes of an element
32
When excitied atoms radiate energy, the amount of energy given off is equal to _________.
J+hv
E= Jv
E= hv
33
What are Dipole forces?
negative to positive charge
has no charge
Unequal positive to negative charges
34
Halogens are in group
18
17
20
19
35
What is common of all atoms of the same element?
all have the same atomic number
dont have the same atomic number
36
What is a chemical reaction?
study of matter
compounds or elements combine to form new products
what all experiments begin with
37
Alkaline Earth Metals are in Group
3
2
1
4
38
Unit of molar mass
Mol
g
g/mol
39
Iron filings are a ______ substance.
compound
pure
ionic
40
What is Chemistry?
earth's ggravitational pull
what all experiments begin at
Study of the composition of matter; physical science
has matter
41
What is a quantum of light called?
photon
Isoptope
quantum
frequency
42
what is the difference between deuterium and tritium?
Tritium has one less neutron
Deuterium has one less neutron
they are the same
43
Living functions as digestive system
biochemistry
organic chemistry
physical chemistry
44
What are the units of the molar enthalpy of fusion?
KJ/mol
Mol
mL
45
What is the Aufbau Principle?
one must have an arrow going up in each orbital before going down
ionic bonds
electron occupies lowest energy level
46
Intensive Property
not depends on matter
depends on matter
47
526m =________ Km
52600
.00526
.526
48
Basic Research
solve problems
increase knowledge
49
What is the unit for volume?
J
g
cm^3
g/cm^3
50
How many sig figs in 0.0120
4
2
3
5
51
What is the unit for force?
cm
J
E
g
52
What is atomic mass?
protons + neutrons
number of protons
average weight
53
What is empirical formula?
Simplest mol ratio
Molecular formula
Find by dividing mass of molecular formula
54
The sets of numbers that determine the properties of atomic orbitals are called _________.
quantum numbers
ionic numbers
photons
55
What is a polyatomic ion?
neutral group of atoms held together by covalent bonds
sea of electrons
a group of covalent elements comibined to form one charge
56
Involves Numbers
analytical chem
organic chem
theroetical chem
57
Most of the volume of an atom is occupied by the _______.
neutrons
protons
electrons
58
Orbitals in n=4 squared =
8 orbitals
16 orbitals
9 orbitals
59
Lattice energy is __________
energy in crystals for ionic bonding
used in covalent bonding
a valence electron
60
The equation for SR is : Ax+ B -> AB + x
True
False
61
Who developed the Atomic Theory?
Tritium
Dalton
Democritus
62
What is mass?
Has matter; never changes
earths gravitational pull
study of matter
63
How are volume and pressure of a gas at constant temp related?
They are not related
Inversely
When one goes up the other goes up also
64
What is a coefficient?
The number after the element or compound
The number in front of the element or compund
65
Four reasons a chemical reaction has occurred
heat energy, gas, soild, color change
color change, precipitate, heat energy, gas given off
color change, soild, liquid, heat
66
Chemical Compound
soild, liquid, gas
elements combined chemically
verical collums of PT
67
A mixture consists of Ag, Pb, and Fe. Which will react with ZnCl2?
Pb
None
Ag
Fe
68
MgCl2 + Zn will occur
True
False
69
What are valence electrons?
they are in crystals
electrons in the out shell
electrons in the inner shell
70
The charge of an ion can be______.
only negative
either positive or negative
only positive
71
What is endothermic?
it absorbs energy, feels cold
not depends on matter
depends on matter
72
How many sig figs in 200
1
2
3
73
Hund's Rule states One must have an arrow going up in each orbital before going down
False
True
74
What calculation does the average atomic mass allow you to complete?
number of protons
molecular mass
valence electrons
75
Example of homogeneous mixture
air, alike throughout mixture
soil
76
Atomic radius decreases __________ across the PT.
right to left
left to right
77
The average atomic mass is the same as the atomic mass
True
False
78
S and P sublevels are called ___________.
f sublevles
only group 1
Main group elements
79
What is atomic number
protons + neutrons
number of neutrons
Number of protons
80
Dry Ice Vaporizes
chemical change
physical change
81
Define amorphous soild
Has a strict form
No form, super cold liquid
A hot solid
82
50% Ionic Character =
nonpolar bond
polar covalent bond
ionic bond
83
What is the unit for mass?
cm^3
g
m
84
Decomposition
chemical change
physical change
85
What is the equation for double replacement?
Ax+By -> Ay + Bx
A+B=C
Ax+ B-> AB + x
86
22cm= ______ mm
2200
220
.0220
87
Electron affinity increases across the PT from _______
right to left
left to right but group 18 is the smallest
left to right
88
Left to right across the P.T. what happens to electron affinity?
becomes more positive
nothing
it becomes more negative
89
What is weight?
has matter; never changes
earth's gravitational pull
what all experiments begin at
Study of matter
