3.2 and 3.3: Quantum Mechanical Model of an Atom Flashcards

1
Q

spectroscopy

A

study of light emitted by excited sources

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2
Q

de Broglie

A

an electron has both partcle and wave like properties

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3
Q

Heisenberg uncertainty principle

A

proved that it is impossible to know the exact position and speed of an electron at a given time

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4
Q

continuous spectrum

A

an emission spectrum that contains all wavelengths in a pecific region of the electromagnetic spectrum

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5
Q

line spectrum

A

contains only those wavelengths characteristic of the element being studied, arises when excited electrons emit energy

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6
Q

emission spectrum

A

the spectrum of electromagnetic radiation emitted by an atom; results when an atom is returned to a power energy state from a higher energy state

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7
Q

Max Planck

A

energy from a blackbody is quantized, energy can be gained or lost in a quantum- (quantum hypothesis)

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8
Q

Einstein

A

photoelectric effect

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9
Q

Niels Bohr

A

energy of electrons is quantized

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10
Q

Pauli

A

exclusion principle

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11
Q

Heisenberg

A

uncertainity principle

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12
Q

schrodinger

A

equation describing energy and location of an electron in a hydrogen atom, standing wave

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13
Q

rutherford

A

discovery of nucleus

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14
Q

thomson

A

discovery of electron

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15
Q

hertz

A

related matter and energy, photoelectric effect(electrons are emitted by matter that absorbs energy from shortwave (ie. higher frequency) electromagnetic radiation.

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16
Q

bunsen and kirchoff

A

(1859) studied the line spectra of chemicals, especially elements, heated in a Bunsen burner flame.
discovered
that an element produces a
bright-line spectrum; each
element has a unique line
spectrum.

17
Q

aufbau principle

A

fill orbitals starting at the lowest available energy orbital before filling higher energy orbitals

18
Q

hund’s rule

A

the lowest energy configuration for an atom is the one with the ,axiumum numebr or unpaired electrons allowed by the pauli exclusion principle; unpaired electroms are represented by having parrele spins

19
Q
A