Exam 1

Question 1

According to the de broglie equation, if two objects are moving at the same speed…

Answer 1

Doubling the mass of one of the objects will have the same effect on its wavelength as does doubling the speed

If one object has twice as much mass as the other, it’s wavelength is one-half the wavelength of the other

Question 2

De broglie equation

Answer 2

Relates the wavelength of any moving company beefy to its mass and it’s speed

Wavelength=h/mu

H-plank constant

M-mass

U-velocity

Question 3

Orbitals with larger values of n are….

Answer 3

Shells that are greater distance from the nucleus and have higher energies than those with lower values of n

Question 4

Value of L and letter identifier

Answer 4

S-0
P-1
D-2
F-3
G-4

(These can be positive or negative numbers and go through interferes in between them- Ex if L=4 then ml can be -3, -2, -1, 0, 1, 2, 3)

Question 5

Magnetic quantum number (ml)

Answer 5

Defines the orientation of an orbital in space. An internet that may have any value from -l to +l, where l is the angular momentum quantum number

Question 6

Heisenberg uncertainty principle

Answer 6

The principle that one cannot simultaneously know the exact position and the fact momentum of an electron

Question 7

As quantum number n increases, the size of the orbital….

Answer 7

Also increases

Question 8

Wavelength of light from lowest energy to highest energy

435nm
565nm
673nm

Answer 8

Lower numbers have higher energy

Question 9

Characteristics that apply to an atomic orbital

Answer 9

Identified by a unique combination of THREE quantum numbers

A region around the nucleus of an atom where the probability of finding an electron is high

Defined by the square of the wave function

Question 10

Degenerate orbitals

Answer 10

Need to be of the same energy

They Don’t have to be of same shape or even angular momentum quantum numbers

Question 11

Aubau principle

Answer 11

The concept of building up ground state atoms so that their electrons occupy the lowest energy orbitals available

Question 12

How to find how many moles of a specific atom are in a compound

Answer 12

Multiple it’s subscript with the number of moles in compound

Question 13

Relationship between frequency and wavelength

Answer 13

They are inversely proportional λν=c

Same with energy and wavelength

Question 14

Excited state atom

Answer 14

total energy of the electrons can be lowered by transferring one or more electrons to different orbitals. That is, in an excited-state atom not all electrons are in the lowest possible energy levels.

Question 15

Hunds rule

Answer 15

Every orbital is singly occupied before it is doubly occupied

Question 16

Ground state

Answer 16

Lowest energy electron configuration for that atom

Question 17

Excited state

Answer 17

An electron can transition from a lower state to a higher energy level by absorbing a quantity of energy (ΔE) that exactly matches the energy difference between two states

This process is called absorption

Question 18

Excited state is more or less stable…why

Answer 18

Less stable

Electron from a higher energy level will then transition to a lower energy level

Question 19

Transitions to higher states (absorption) have _____ΔE values

Answer 19

Positive

Question 20

Transitions to lower states (emission) have ______ ΔE values

Answer 20

Negative

Question 21

Represents the number of joules in a single quantum of energy

Answer 21

E

Question 22

A quantum of electromagnetic radiation

Answer 22

Photon

Question 23

Vo

Answer 23

Threshold frequency

The minimum frequency of light required to produce the photoelectric effect

Question 24

Work function

Answer 24

Minimum quantity of energy needed to emit photoelectrons from a photoelectric material

Related to strength of attraction between the nucleus of metals atom and the electrons surrounding its nuclei

Question 25

De broglie equation

Answer 25

λ=h/mu

Question 26

The more momentum a particle has…. the ____its de profile wavelength

Answer 26

Shorter

Question 27

1J=

Answer 27

1kg•m2/s2

Question 28

Aufbau principle

Answer 28

Each electron goes into the lowest energy orbital available

Question 29

Pauli exclusion principle

Answer 29

No two electrons can have the same set of four quantum numbers

Question 30

Heisenberg uncertainty principle

Answer 30

We can not determine both the position and the momentum of an electron in an atom at the same number

Question 31

Where do degenerate orbitals occur

Answer 31

P
D
F

Question 32

Hunds rule

Answer 32

The lowest energy electron configuration of an atom has the maximum number of unpaired electrons, all of which have the same spin degenerate orbitals

Also-each orbitals in a sub level is singly occupies before any orbital is doubly occupied

Question 33

One isotope makes 97% of calcium atoms..which one?

Answer 33

40Ca

Question 34

Isotopes have

Answer 34

Same atomic number but different mass number

Question 35

Pauli exclusion principle

Answer 35

no two electrons can have the same four electronic quantum numbers

Question 36

An ion is formed when

Answer 36

Electron is taken from highest energy orbital (n value)

Question 37

Anode

Answer 37

Device where current flows IN from outside

(Oxidation)

(Don’t panic) (positive is anode negative is cathode)

Question 38

Cathode

Answer 38

Decide where current flows OUT

(Reduction)

(Don’t panic) (positive is anode negative is cathode)