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26 Cards in this Set
- Front
- Back
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What is the numerical value for the speed of light (c)?
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2.998x10^8 m/s
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All EMR (electromagnetic radiation) can be described in terms of _____, ______, and ______
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wavelength, frequency, and amplitude.
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Distance between crests.
Length units (m, cm, nm). This is known as... |
Wavelength
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Top to bottom distance;
intensity (brightness) Known as.. |
amplitude
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number of complete waves passing a
fixed point per unit time (units = s-1) known as.. |
frequency
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These type of waves have a low frequency (v) and a long wave length
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Radio waves
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These types of waves have a high frequency (v) and a short wavelength
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Gamma rays
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he stated that light consists of a
stream of “massless” particles = photons. |
Planck
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The energy of a photon depends on the
______ of the photon. |
frequency
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Who confirmed planck's theory and won the nobel prize
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Einstein
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Electromagnetic radiation contains both _______ and ______ properties
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wave and particle
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Wave particle duality
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EMR contains both wave and particle properties
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provided the first explanation of the line
emission spectra for atoms. |
Neils Bohr
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Where is the lowest energy level located.... known as......
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Near the nucleus... ground state
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proposed that all moving
objects act as waves (even electrons): |
Louis De Broglie
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What theory, in quantum mechanics, is the one we used today?
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The shrodinger wave equation
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What 2 pieces of information do wavefunctions provide?
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The allowable energy states for each electron in an atom and the region of space where each electron is most likely to be found
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How many electrons can an orbital hold?
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2
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What are valence electrons
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electrons in the outermost
principal quantum level of an atom (outer-shell e-) |
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Core electrons
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all electrons excluding the valence electrons
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Atoms or ions that contain unpaired electrons are
called |
Paramagnetic
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Atoms ______ as you go down a group
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Grow
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Atoms_____ as you go across a period
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shrink
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What is ionization energy?
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The amount of energy required to remove an electron from an isolated, gas-phase atom
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The amount of energy released when a free, gas-phase
atom gains and e- A measure of the attraction an atom has for an additional electron |
electron affinity
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These elements are electron deficient. They do not follow the octet rule. What are the elements and how many electrons are they satisfied with?
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Be-4 B-6 H-2
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