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21 Cards in this Set
- Front
- Back
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The atom comes from which Greek word, and means what? |
Atomos, "indivisible" |
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John Dalton's Atomic Theory |
1. Atoms make up everything, and are indivisible and indestructible 2. Atoms of the same element are identical 3. Atoms of two or more elements form a compound 4. In a chemical reaction, the atoms rearrange themselves. |
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Gold Foil Experiment |
Conducted by Ernest Rutherford. Aimed alpha particles at a piece of gold foil, concluded that atoms are mostly empty space. |
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Particles that make up the nucleus of the atom. |
Neucleons, comprised of protons and neutrons |
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Isotopes |
Atoms of an element that have different numbers of neutrons, and therefore different mass numbers. |
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The atomic mass is... |
The sum of all the neucleons of an atom. |
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Quantum |
A very specific quantity of energy |
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Bohr suggested that electrons do what to get to a higher energy level. |
Electrons can absorb a quantum of energy, then jump to a higher energy level. Known as the excited state. |
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Principle quantum number represents.. |
The main energy level of the electron. The maximum number of electrons in this level is found using the formula 2n^2 |
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In 1s^2, describe the parts. |
"1" - energy level "S" - sublevel "2" - number of electrons in the sublevel |
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Hund's rule states? |
Orbitals of equal energy are each occupied by a single electron before an orbital is occupied by a pair of electrons. |
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The Pauli Exclusion Principal states? |
No two electrons in the same atom can have the same state. Because of this, electrons can either be spin up or spin down. |
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Formula to figure wavelength |
C = wavelength x frequency Therefore: Wavelength = 3x10^8 ÷ frequency Solution in m |
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Formula to figure frequency |
C = wavelength x frequency Therefore: Frequency = 3x10^8 ÷ wavelength Solution in hz |
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Formula to figure energy |
E = h x frequency E = 6.26x10^-34 x frequency Solution in Jules |
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Energy levels |
S, P, D, F 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 |
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Nobel Gasses |
He - 1s^2 Ne - 2p^6 Ar - 3p^6 Kr - 4p^6 Xe - 5p-^6 Rn - 6p^6 |
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S block? |
S block |
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P block? |
P block |
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D block? |
D block |
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F block? |
F block |
