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