chem unit 4 test

Question 0

how many different s configurations are there? (aka orbitals)
p?
d?
f?

Answer 0

1,3,5,7

Question 1

the energy level equals ___ and the sublevels are ____________

Answer 1

n, spdf

Question 2

______ occupy orbitals

Answer 2

electrons

Question 3

orbitals have an energy order that is

Answer 3

lowest (ground state) to highest (excited state)

Question 4

what is the ground configuration for N^-3

Answer 4

1s2, 2s2, 2p6 (add three electrons)

Question 5

what is the top of a wave?
bottom?
height?
distance from two tops?

Answer 5

crest (ridge)

trough, amplitude, wavelength

Question 6

shorter wavelength means _____ frequency and ______ energy

Answer 6

higher, higher

Question 7

what is the order on the spectrum for shorter—-longer wavelength

Answer 7

gamma-rays, x-rays, ultra-violet, visible light (VIBGYOR), Infrared, Radio-waves

Question 8

light has a ______ nature (behaves as a wave)

Answer 8

dual

Question 9

what is a photon

where do they travel

Answer 9

quanta of energy (package of energy)

transverse waves

Question 10

the wavelength is the distance between two _________ waves

Answer 10

adjacent

Question 11

what is amplitude

Answer 11

amount of energy (shape/color)

midpoint—>crest=midpoint—>trough

Question 12

the color of light is established by the ________

Answer 12

wavelength
wide length=low energy (red)
small length=high energy (violet)

Question 13

what is frequency?

Answer 13

how many waves pass a point(observer’s eye) in 1 second

=cursive v

Question 14

what are some units for frequency

Answer 14

wps, cps, hertz(hz), s^-1(per second)

Question 15

wavelength is measured in ___

Answer 15

meters

Question 16

electrons travel at _______

Answer 16

the speed of light (3.0x10^8s)

Question 17

true or false

not all forms of radiation travel at the same speed

Answer 17

false-all forms of radiation travel at the same speed

Question 18

E=photon energy

how is it found?

Answer 18

E=hc/wavelength (lamda)

E=hv

Question 19

h is called ________ and is equal to ______

Answer 19

planck’s constant, 6.626x10^-34 J*S

Question 20

where do electrons start

Answer 20

ground state (lowest possible energy)

Question 21

electrons __________ orbit, but _____ confined in 3D space

Answer 21

do not, are

Question 22

electron density regions

Answer 22

orbitals

Question 23

orbitals have a number and a name
number=
name=

Answer 23

• energy level (n)–7 energy levels (periods 1-7)

- shape it can travel in (s)–s shape (sphere), p (peanut), d (double peanut), f (flowers)

Question 24

what is the Aufbau Principle

what is Hund’s Rule

Answer 24

when assigning orbital to electrons, always fill lowest energy first
electrons want to be unpaired until they’re forced to pair (Aufbau’s Principle)

Question 25

where is the s block, p block, d block and f block

Answer 25

groups 1-2, 13-18, 3-12, lanthanides and actinides

Question 26

every orbital can hold ___ electrons

Answer 26

2

3 configurations for p orbital–so it can hold 6

Question 27

the energy level assigned in the d-block has to be _____ while the f-block is _____

Answer 27

n-1, n-2

period 5 elements would be 4d

Question 28

in the following electron configuration, how many valence electrons does the element have?
1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d3

Answer 28

2

Question 29

in groups 1 and 2, valence number =________

in p-block_________

Answer 29

group number

group number-10

Question 30

in orbitals, electrons ____ each other (arrows in ____ directions)

Answer 30

repel, opposite

Question 31

quantum numbers describe the _____________

Answer 31

electron configurations

Question 32

what does the principle quantum number, n, do

Answer 32

describes the main energy levels electron occupies

n=1,2,3,4,5,6,7

Question 33

what is the subsidiary quantum number, cursive l, say

Answer 33

also called Azithmal
designates the shape of the region the electron occupies
l=0,1,2,3 (n-1)
l designates the sublevel and is given a letter notation

Question 34

what is the magnetic quantum number, m sub l, do

Answer 34

designates the spatial orientation of atomic orbital

m sub l= -l…0…l

Question 35

what is the spin quantum number m sub s

Answer 35

m sub s= -1/2 or +1/2

Question 36

no 2 electrons can have the same 4 quantum numbers, true or false

Answer 36

true

Question 37

what is electron dot notation

Answer 37

indication of the number of valence electrons around the element’s symbol
there cannot be more than 2 dots along any side of the symbol

Question 38

what are the exceptions to Aufbau’s Principle

when is stability achieved

Answer 38

1/2 filled orbitals are more stable than partially filled orbitals
orbitals are filled completely, 1/2 filled, partially filled to some degree (best to worst)

Question 39

what elements follow exceptions to Aufbau’s

Answer 39

Chromium down, Copper down

Question 40

what does frequency=
wavelength=
energy=

Answer 40

c/y
c/v
hv
hc/y

Question 41

name the three major divisions within an electron cloud with respect to the energy of an electron

Answer 41

the energy level, the orbital shape, ????????(ask)

Question 42

how can we determine the possible number of sublevels in an energy level

Answer 42

it is equal to n or the subsidiary number

Question 43

is this a possible combination of quantum numbers

n=6, l=5, m=-5, s=+1/2

Answer 43

yes-although 5 is not a known subsidiary number (block), it is 6-1