Quantum Mechanics

Question 1

Wavelength

Answer 1

(l) is the shortest distance between equivalent points on a
continuous wave.

Question 2

Frequency

Answer 2

(n) is the number of waves that pass a given point per second
(Hz = s-1).

Question 3

Amplitude

Answer 3

the wave’s height from the origin to a crest, or from the
origin to a trough.

Question 4

includes all forms of electromagnetic radiation, with the only differences in the
types of radiation being their frequencies and wavelengths

Answer 4

Electromagnetic spectrum

Question 5

James Clerk Maxwell (1831-1879) proposed that visible light consists of

Answer 5

electromagnetic waves.

Question 6

visible light consists of

Answer 6

electromagnetic waves.

Question 7

is the emission and transmission of energy in
the form of electromagnetic waves.

Answer 7

Electromagnetic radiation

Question 8

Speed of light (c) in vacuum

Answer 8

Speed of light (c) in vacuum

Question 9

solved the mystery of blackbody in 1900 and said that
atoms and molecules could emit (or absorb) energy only in discrete quantities, like
small packages or bundles

Answer 9

Max Planck (1858-1947)

Question 10

The wavelength of the light emitted by heated
metal depends on the

Answer 10

Temp

Question 11

is the minimum amount of energy
that could be gained or lost by an atom.

Answer 11

Quantum

Question 12

• energy radiated by any object or system that absorbs
  all incident radiation. It usually refers to the spectrum of light emitted by any
  heated object.

Answer 12

B lackbody Radiation

Question 13

small packet of energy or discrete bundles in which radiation
and other forms of energy occur

Answer 13

Quanta - a

Question 14

Classical explanation:

Answer 14

the amount of
energy emitted has no upper limit.

Question 15

Planck’s explanation

Answer 15

: the energy from
oscillating electrons can only happen
at a certain fixed values, called
packets (or quanta) of energ

Question 16

phenomenon in which
electrons are emitted from a metal’s surface
when light of a certain frequency, or higher than
a certain frequency, shines on the surface

Answer 16

Photoelectric Effect - a

Question 17

Neils Bohr proposed that the hydrogen atom has only certain allowable energy
states. The lowest allowable energy state of an atom is called its

Answer 17

ground state.

Question 18

When an atom gains energy, it is said to be in

Answer 18

excited state.

Question 19

Proposed quantum theory

Answer 19

Niels bohr

Question 20

When an electron goes from
a higher to lower or lower to higher, a photon
is emitted.

Answer 20

higher to lower

Question 21

In the ? the atom does not radiate energy.

Answer 21

ground state, n=1,

Question 22

As energy is added,
the electron moves to a higher-energy orbit and raises the atom to an ?

Answer 22

excited state.

Question 23

Electrons occupy three-dimensional regions of space called.

Answer 23

orbitals

Question 24

It is more likely to find the electron close to the nucleus and within the
volume of the boundary, than to find it ? the boundary.

Answer 24

outside

Question 25

The principal quantum
number n defines the

Answer 25

location of the energy level.

Question 26

It also describes the radial
distance of the electrons
from the nucleus.

Answer 26

principal quantum
number n

Question 27

, describes the shape of the “volume”
of space that the electron occupies.

Answer 27

The angular momentum quantum number, l

Question 28

escribes the orientation of
the orbital in space.

Answer 28

The magnetic moment quantum number ,ml,

Question 29

describes the orientation of the electron in
terms of spin.

Answer 29

The spin quantum number ,ml,