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Chem Chapter 3/4 Flashcards | StudBud
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Chem Chapter 3/4
Chem Chapter 3/4
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Marian H-Chem Chapters 3 and 4 #chemistry
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1
What is ground state?
The lowest energy state of an atom or other particle.
When gravity keeps atoms on the ground
Where protons are
Highest energy state
2
Photoelectric effect is...
The emission of electrons from a metal when light shines on the metal
When your photo emits energy
Number of waves passing point in given time
3
Who stated the Law of Multiple proportions?
Bohr
Thomson
Darwin
Dalton
4
Find wavelength when frequency is 1.28*10^17 Hz...
2.34*10^-9 m
2.34*10^9 m
2.34*10^-9 Hz
3.00*10^8 m
5
What is Frequency?
The rate at which a wave moves up and down.
The fact of being frequent or happening often.
the ratio of the number of actual to possible of an event
The number of times something occurs in a given sample
6
3.99*10^-7 meter wavelength us how many Joules?
3.99*10^8 J
4.98*10^-19 J
4.98*10^19 J
3.00*10^8 m
7
Who created this model of the atom?
Dalton
Rutherford
Thomson
Bohr
8
What is an Orbital?
The orbit of the Moon around the Earth
The area where a Proton will probably show up
The orbit of the Earth around the Sun
The area where a Electron will probably show up
9
Who believed that everything has 4 core elements?
Aristotle
Bourne
Democritus
Montgomery
10
Who conducuted the oil drop experiment?
Democritus
Millikan
Calhoun
Miller
11
Units of wavelength?
seconds
Hertz
meters
12
Who developed the law of conservation of mass?
Proust
Thomson
Lavoisier
St Clair
13
What orbital can hold 14 electrons?
s
d
e
f
14
Who proposed the Plum Pudding Model?
Thomson
Rutherford
Chadwick
Dalton
15
What did Chadwick discover?
Neutrons
Elections
Photons
Protons
16
Schrödinger and Heisenberg said the electrons were. . .
In the nucleus
On specific paths
In an indefinite cloud
Where dalton predicted
17
The higher the frequency, the higher the wavelength.
False
True
18
What is the Law of Definite Proportions?
A given compound always contains the same proportions
The ratio of the masses are always whole numbers
A chemical formula must always be balanced
A given compound always contains different proportions
19
Who experimented with Cathode Rays?
Thomson
Rutherford
Becquerel
Chadwick
20
Frequency is measured in...
Grams
Hertz
w/s
Meters
21
What is wavelength?
A wave
Distance between one point on a wave and the exact same place on the next.
How far the medium particles move from rest position.
The length of a wave..
22
What orbital shape is shown in this picture?
p
f
d
s
23
What is the speed of all wavelengths?
4.5*10^6
6.626*10^32
3.0*10^8
7.8*10^15
24
What holds the nucleus together?
strong force
element
molecule
25
Energy is measured in....
Watts
Joules
Centimeters
Kilograms
26
How many electrons can fill one orbital?
2
6
1
4
27
What orbital shape is shown in this picture?
s
f
d
p
28
Who developed the law of definite proportions ?
Lavoisier
Proust
Washington
Clair
29
What is planks constant? (H)
6.626*10^-34
3.0*10^8
6.02*10^23
30
what does the atomic theory state
all of the above
Atoms of the same element are the same
all matter is made up of atoms
Atoms combine in whole-number ratios to form compounds
31
Why do we remember Henry Mosley?
He discovered Metalloids.
He discovered the Proton.
He discovered that the atomic number gives number of protons
He discovered x-rays.
32
The Pauli Exclusion principle states that...
The lowest available energy level is filled first.
Electrons must be paired with opposite spins.
Every orbital on an energy level needs an electron.
33
Which block is the blue elements?
D block
F block
P block
S block
34
7.50 mol SO2 in grams is....
64.06 g
480.45 g
480 g
750 g
35
Who did the Gold Foil Experiment?
Thomson
Dalton
Bohr
Rutherford
36
How do you find atomic mass?
The product of protons and neutrons
The product neutrons and electrons
The sum of protons and neutrons
The sum protons and electrons
37
Which scientist developed the atomic theory?
Dalton
Einstein
Rutherford
Chadwick
38
Which block is the yellow elements?
S block
F block
D block
P block
39
A quanta energy that has some of the characteristics of particles is...
The beach
A wave
Photons
A stream of particles
40
What is the formula relating frequency and energy?
E=hv
E=mc2
c=λv
c=Ev
41
What is Avagadro’s number?
6.02x10^23
6.002x10^23
10.00x^6.23
6.20x10^23
42
What is molar mass?
The mass of one mole of a substance
The amount of molecules in a mole of a substance
The mass of the average mole rat
The amount of moles in one gram of a substance
43
Which block is the green elements?
F block
S block
P block
D block
44
What is the formula relating frequency and wavelength?
c=cookie
c=νλ
E=mc2
E=hv
45
The Aufbau principle states that...
Every orbital on an energy level needs an electron.
The lowest available energy level is filled first.
Electrons must be paired with opposite spins.
46
Hund’s rule states that
all orbitals must first fill with one electron
orbital filling is a random process
energy levels will change as orbitals are filled
orbitals must have 1 electron before further filling
47
Which orbital has a dumbbell shape?
p
s
f
d
48
Choose the orbital shape of the s sublevel?
spherical
dumbbell
L shaped
squared
49
When an electron jumps from the ground state to an excited state:
A photon is neither absorbed nor emitted
A photon is absorbed
A photon is emitted
50
What was a triumph of the Bohr model?
Could explain all atoms
Found halogens are reactive bc it has one e- less than full outer orbital
Found alkali metals are reactive bc they have only one e- in outer orbital
Explained periodic law
51
Who believed that breaking something over and over would eventually lead to an unbreakable atom
Democritus
Proust
Caesar
Aristotle
52
How do you measure the wavelength?
Trough to Trough
Crest to Crest
Resting line to Crest
Node to Node to Node
53
What elements did the Bohr model work for?
All gasses
Hydrogen
All atoms
S orbital
54
Who developed the planetary model of the atom?
Dalton
Rutherford
Darwin
Democritus
55
Solve for amu...
25.22 amu
25 amu
24.88 amu
24.31 amu
56
What does quantum mechanical model determine...
As wavelengths increases, frequency decreases
The speed of light
Frequency and wavelength are inversely proportional
Allowed energies on electron can have
57
What is the law of conservation of matter?
everything must be destroyed
Humans are the top predators on the top of the food chain
No matter is ever made or destroyed
No matress is ever made or destroyed
58
Bohr Model of Atom was perfect?
True
False
59
What is the Law of Multiple Proportions?
the atoms form into chemicals
we can cut them into many pieces
elements combine in different ratios by weight and form
we cant see them but we can feel them
60
Rutherford's experiment also proved this about the nucleus...
It is made of protons and neutrons.
It has great mass compared to the rest of the atom.
It is gold in color.
It can be seen with a microscope.
61
Which block is the red elements?
F block
S block
D block
P block
