Chemistry Unit 1 Review Questions: What is Chemistry? – Wave Particle Duality
Introduction
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What is Chemistry?
What are the five branches on chemistry?
What is a hypothesis?
What is an independent variable in a lab experiment?
What is a dependent variable in a lab experiment?
What is a periodic table?
Scientists
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What is a scientist?
Who proposed that matter was composed of tiny indivisible particles?
Who made the Billiard Ball Model and the four postulates?
Who developed the Cathode Ray Tube, Plum Pudding Model and discovered electrons?
Who developed the Oil Drop experiment and discovered the mass of an electron?
Who made the Gold Foil experiment, Nuclear Model and discovered a dense, positive center surrounded by
negative electrons?
13) Who made the Planetary model and discovered electrons travel in circular orbits within specific energy levels?
14) Who discovered neutral particles in the nucleus of the atom (neutrons)?
Atomic Structure
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The smallest unit of matter that retains the identity of the substance?
The region surrounding the nucleus; contains the space of the atom?
The center of the atom; that mass of the atom?
Particle Mass: Alpha particles had a mass of 6.64 x 10—27, Beta particles have a mass number of 9.10938188 × 1031
, Neutrons have a mass number of 1.674 927 351 x 10-27
Arrange particle mass in decreasing order.
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Particles that makeup the atom?
Name the three subatomic particles, where they are located and their charges.
What is the overall charge of a stable atom?
True or False: In a stable atom, protons and neutrons must equal.
The number which tells the number of protons in an atom?
The number which tells the number of protons and neutrons in an atom?
Equation for finding the number of neutrons in an atom.
Determine the number of subatomic particles in the following atoms. (Remember if you are not given a mass
number then you have to use the one on the periodic table.)
Cl
P:
N:
E:
P:
N:
E:
40 K
27) Draw the Bohr Model of a Na atom with a mass number of 25.
28) Name the particles which makeup subatomic particles.
Chemistry Unit 1 Review Questions: What is Chemistry? – Wave Particle Duality
Isotopes
29) Atoms of the same element with different numbers of neutrons are called?
30) The weighted average of the masses of different isotopes on an element is called?
31) Determine the number of subatomic particles in the following atoms.
P:
N:
E:
60 Ni
P:
N:
E:
12 B
2+
P:
N:
E:
14 C
32) How did the new and old pennies relate to isotopes? (Complete sentences)
33) What is the A value for K?
34) What is the Z value for Cl?
Rest Station: Work on problems you have not finished or take a break for a few.
Electron Configuration
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Which rule states that orbitals can hold TWO electrons with opposite spins?
Which rule states that electrons fill the lowest energy orbitals first?
Which rule states that within a sublevel, place one e- per orbital before paring them?
Write the longhand configuration for 17 eWrite the shorthand configuration for 17eWrite the longhand configuration for As
Write the noble gas configuration for As
Chemistry Unit 1 Review Questions: What is Chemistry? – Wave Particle Duality
42) Write the noble gas configuration for Rn
43) Complete the following Aufbau diagram for Ar
44) Period number tells you?
Group number tells you?
Electrochemistry & EM spectrum
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Y or N: Do all elements give on the same amount of energy when excited?
E- absorb energy to jump to a high level called the?
E- emit energy to fall back to the original state called the?
Electrons move from one energy level to another by gaining or losing __________.
The lowest energy lever is located?
Energy absorbed __________ Energy released_________ Energy of light produced
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What is the EM spectrum?
When an electron falls from n=6 to n=3, what wavelength is produced and in whish region of the EM spectrum?
When an electron falls from n=4 to n=2, what color of light is produced?
The distance between identical points on a wave is called?
The number of waves in a time interval is called?
56) Use up and down arrows to indicate directional proportional or indirectly proportional for the following. 
a) Wavelength vs Frequency
b) Energy vs Wavelength
c) Frequency vs Wavelength