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When two similar charges approach eachother they will want to
Repel
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As distance increases
The force decreases
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How would find the density of an irregular shaped rock?
- I would find the mass by weighing the object
- I would find the volume by measuring the width, length and height and multiplying the three.
- I would divid the volume by the mass m/v to get its density.
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Radiation
Energy or particles emitter(released) from a nucleus
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What is the main difference between fission and fusion
Fusion involves small atoms combining fission involves big atoms splitting
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Our sun is best described as
Low mass, main sequence star
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What does the neutrons contain
Protons and neutrons are found in
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Elements heavier than helium can be described as the result of
Fusion in stars during the red giant phase
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During the red giant phase of the star the balance of the force of gravity and the force from fusion in the core are
fusion dominates this phase
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During the nebula face the balance of the force of gravity and the force of fusion in the core are
Gravity dominates the phase
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During the main phase of the star the balance of the force of gravity and the force from fusion in the core are
Fusion and gravity are equal
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Most of the heavy elements are created from
Merging neutron stars creates
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Star phase
Nebula—> main sequence—> red giant—> planetary nebula—> white dwarf—> black dwarf
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In what phases of the star cycle have no fusion
Nebula, planetary nebula, white dwarf, black dwarf
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What phase of the star cycle has hydrogen fusion
Main sequence phase
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What phase of the star cycle has helium fusion
The red giant phase
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High mass star cycle
Nebula—>Main sequence—> Red giant—>supernova—>Black hole/neutron star
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In what phase are heavy atoms formed in high mass stars
The supernova phase in the high mass star cycle
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0/-1e represents what
Electron capture
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4/2 a represents what
Alpha decay
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0/+1e represents what
Positron emission
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The Bohr model primarily differs from the Rutherford model in that
This model places electrons on discrete energy levels
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Photon energy is quantized meaning that
It can only be certain Amounts instead of being a gradient
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How does the Bohr model explain emission spectra
Emission spectra show quantized energy levels as discrete bonds of light
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The wavelength of light most directly determines what
The color of light that you can see is determined by this
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Describe the relationship between energy and wavelength
Energy is inversely related to wavelength
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With this shift wavelength gets longer
Red shift
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With this shift wavelength gets shorter
Blue shift
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E3 to E2 demonstrates this
A lower energy emission with a low frequency
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E5 to E2 demonstrates what
This represents a high energy emission with a shorter wavelength and higher frequency
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How does Coulomb’s law predict atomic radius
As the number of protons increases, the attraction between the nucleus and electrons increases therefore the radius decreases
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Describe the relationship between wavelength and energy
Wavelength and energy are inversely proportional: as wavelength increases, energy decreases
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Relationship between frequency and energy
Frequency and energy are directly proportional: as frequency increases, energy increases
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How does the energy of an electron change as it comes closer to the nucleus
Energy decreases as it comes closer to this
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What is an excited state electron
Excited electrons occupy orbitals with higher energy than the lowest energy orbital available
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An elements identity is based offf its
Atomic number tells you an elements
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In an experiment positively charged particles are shot at an atom. The results show the at the particles did not continue through the atom, but were instead deflected. This result illustrates that
Most of an atoms mass is concentrated in a positively charged and relatively small portion of the atoms entire volume
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Ionic compounds
Composed of a metal and non metal
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Covalent compounds
Composed of two non metals
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How are ionic compounds formed
This compound has a large difference in electronegativites
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What is the difference between polar and non polar covalent bonds
Polar bonds cause a partial separation of charges while non polar bonds do not
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C3H7
Tricarbon heptahydride
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Cations have what charge
Positive
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Atoms that lose their electrons to form an o text are know as
Cations
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Atoms that gain electrons to form an octet are known as
Anions
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The protons and electrons are always the same
In a neutral element
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What compounds has a high melting point and is easy to conduct
Ionic compounds
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What compound has a low melting point and is easy to conduct
Polar covalent conpounds
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What compound has a low melting point and is hard to conduct
Non polar covalent compounds
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What does CO2 represent
A molecule that is non polar and has polar bonds
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Relationship between concentration and reaction rate
The higher the concentration the higher the reaction rate
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Single electron
One electron
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Pair
Double electron w/ opposite states
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What happens to white light when it passes through a prism
Light splits into color of rainbow
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How to find the speed of light
C=wf
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