Chemistry chapter 7

Question 1

what is E?

Answer 1

E is the energy of a photon

Question 2

what is h and what does it equal?

Answer 2

h=6.626x10^-34 J(s), h is planks constant

Question 3

what are the units of frequency?

Answer 3

Hz, s^-1

Question 4

what is the equation for the energy of a Photon?

Answer 4

E=hv

Question 5

what is the equation of the speed of light?

Answer 5

C= wavelength x frequency

Question 6

what is a quantum?

Answer 6

Packet of energy

Question 7

what is a photon?

Answer 7

particle of light

Question 8

what is wavelength?

Answer 8

distance between 2 consecutive peaks or troughs in a wave

Question 9

what is the principal energy level?

Answer 9

It is represented by the principle quantum number n

Question 10

when wavelength increases, energy and frequency…

Answer 10

decreases

Question 11

wavelength and frequency have a —- type of relationship?

Answer 11

inverse

Question 12

What is the origin of the atomic spectrum?

Answer 12

transitions of electrons within an atom as they jump from a higher energy levels to lower energy

Question 13

What is the continuous spectrum?

Answer 13

A continuous spectrum is a range of colors emitted by an object that displays all wavelengths of light without any gaps or interruptions.

Question 14

what is the quantum model?

Answer 14

The electron in a hydrogen atom moves around the nucleus in certain allowed circular orbits

Question 14

what does the line spectrum show?

Answer 14

A line spectrum shows the specific wavelengths of light emitted or absorbed by an element or compound.

Question 14

energy is ____ and can occur in discrete units of ___

Answer 14

quantized; hv

Question 15

continues spectra shows what number of wavelengths?

Answer 15

contains all wavelengths of a given range

Question 16

how many wavelengths does the line spectrum show?

Answer 16

contains only a few wavelengths

Question 17

radiation from rainbows is an example of what?

Answer 17

the continuous spectrum

Question 18

hydrogen emission spectrum is an example of what?

Answer 18

the line spectrum

Question 19

the line spectrum is aka

Answer 19

atomic spectrum

Question 20

continuous spectrum is aka

Answer 20

molecular spetra

Question 21

what is the bohr model?

Question 22

what is the ground state?

Answer 22

lowest possible state of an atom or molecule

Question 23

excited state

Answer 23

higher energy state of an atom or molecule can pared to its ground state(when the electron is in any energy level above the ground state)

Question 24

what are some of the important concepts in a bohr model?

Answer 24

Quantized energy levels, stable orbitals, energy transitions, and angular momentum quantization, represent a hydrogen atom model.

Question 25

What is heisenbug's uncertainty principle?

Answer 25

Cannot know both the exact speed (momentum) or position of an electron; if you know one, the other becomes more uncertain.

Question 26

what does an orbital represent?

Answer 26

the probable location of an electron

Question 27

what is an orbit?

Answer 27

refers to the fixed path of an electron that goes around the nucleus

Question 28

what is ψ referring to?

Answer 28

The wave function, coordinates the electrons position in a 3-d space (mathematical description of a quantum state of a particle)

Question 29

What is the Angular momentum quantum number?

Answer 29

l (refers to sublevels)

Question 30

what is the magnetic quantum number

Answer 30

ml

Question 31

What letter represents the size of an orbital?

Answer 31

n

Question 32

what letter represents the shape of an orbital

Answer 32

l (refers to the sublevels)

Question 33

when l=0 what orbital is represented?

Answer 33

s orbital, shape of a sphere

Question 34

when l=1 what orbital is represented?

Answer 34

s, and p orbital (shape of a dumbbell)

Question 35

what is Puli Exclusion Principle?

Answer 35

The Pauli Exclusion Principle states that no two electrons in an atom can have the same set of four quantum numbers. and Electrons have to spin in oposite directions

Question 36

energy sublevels are also known as

Answer 36

orbitals

Question 37

what is the shape of the 2p atomic orbital

Answer 37

dumbbell

Question 38

how many energy sublevels in the 3rd principal energy level?

Answer 38

3

Question 39

The quantum mechanical model of an atom is...

Answer 39

concerned with the probability of finding an electron in a certain position

Question 40

what is the outermost energy level?

Answer 40

valence electrons

Question 41

in order to occupy the same orbital, two electrons must have

Answer 41

opposite spins

Question 42

what are the quanta of light called

Answer 42

Photons

Question 43

What is the light giving off by an electric discharge through a sodium vapor is what?

Answer 43

emission

Question 44

Aufbau Principle

Answer 44

lowest energy fills first

Question 45

Penetration effect

Answer 45

the ability of an electron in an atom to get close to the nucleus, effectively reducing the shielding effect caused by other electrons.(2s electron penetrates too the nucleus more than once in the 2p orbital)

Question 46

square of a wave function

Answer 46

indicates the probability an electron near a particular point in space

Question 47

what are nodes

Answer 47

areas of zero probability in an orbital

Question 48

what is degenerate?

Answer 48

same energy

Question 49

polyelectronic atoms

Answer 49

atoms with more than one electron

Question 50

Hund's rule

Answer 50

how electrons fill degenerate orbitals, each electron will first fill an available orbital individually before any pairing occurs.

Question 51

shielding effect

Answer 51

The shielding effect refers to the phenomenon where inner-shell electrons partially block the attraction between the nucleus and outer-shell electrons.

Question 52

square of a wave function is represented by

Answer 52

probability distribution