3.2 and 3.3: Quantum Mechanical Model of an Atom

Question 1

spectroscopy

Answer 1

study of light emitted by excited sources

Question 2

de Broglie

Answer 2

an electron has both partcle and wave like properties

Question 3

Heisenberg uncertainty principle

Answer 3

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

Question 4

continuous spectrum

Answer 4

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

Question 5

line spectrum

Answer 5

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

Question 6

emission spectrum

Answer 6

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

Question 7

Max Planck

Answer 7

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

Question 8

Einstein

Answer 8

photoelectric effect

Question 9

Niels Bohr

Answer 9

energy of electrons is quantized

Question 10

Pauli

Answer 10

exclusion principle

Question 11

Heisenberg

Answer 11

uncertainity principle

Question 12

schrodinger

Answer 12

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

Question 13

rutherford

Answer 13

discovery of nucleus

Question 14

thomson

Answer 14

discovery of electron

Question 15

hertz

Answer 15

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

Question 16

bunsen and kirchoff

Answer 16

(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.

Question 17

aufbau principle

Answer 17

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

Question 18

hund’s rule

Answer 18

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