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Flashcards in chem unit 4 test Deck (44):
0

the energy level equals ___ and the sublevels are ____________

n, spdf

1

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

1,3,5,7

2

______ occupy orbitals

electrons

3

orbitals have an energy order that is

lowest (ground state) to highest (excited state)

4

what is the ground configuration for N^-3

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

5

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

crest (ridge)
trough, amplitude, wavelength

6

shorter wavelength means _____ frequency and ______ energy

higher, higher

7

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

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

8

light has a ______ nature (behaves as a wave)

dual

9

what is a photon
where do they travel

quanta of energy (package of energy)
transverse waves

10

the wavelength is the distance between two _________ waves

adjacent

11

what is amplitude

amount of energy (shape/color)
midpoint--->crest=midpoint--->trough

12

the color of light is established by the ________

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

13

what is frequency?

how many waves pass a point(observer's eye) in 1 second
=cursive v

14

what are some units for frequency

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

15

wavelength is measured in ___

meters

16

electrons travel at _______

the speed of light (3.0x10^8s)

17

true or false
not all forms of radiation travel at the same speed

false-all forms of radiation travel at the same speed

18

E=photon energy
how is it found?

E=hc/wavelength (lamda)
E=hv

19

h is called ________ and is equal to ______

planck's constant, 6.626x10^-34 J*S

20

where do electrons start

ground state (lowest possible energy)

21

electrons __________ orbit, but _____ confined in 3D space

do not, are

22

electron density regions

orbitals

23

orbitals have a number and a name
number=
name=

-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)

24

what is the Aufbau Principle
what is Hund's Rule

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

25

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

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

26

every orbital can hold ___ electrons

2
(3 configurations for p orbital--so it can hold 6)

27

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

n-1, n-2
(period 5 elements would be 4d)

28

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

2

29

in groups 1 and 2, valence number =________
in p-block_________

group number
group number-10

30

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

repel, opposite

31

quantum numbers describe the _____________

electron configurations

32

what does the principle quantum number, n, do

describes the main energy levels electron occupies
n=1,2,3,4,5,6,7

33

what is the subsidiary quantum number, cursive l, say

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

34

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

designates the spatial orientation of atomic orbital
m sub l= -l...0...l

35

what is the spin quantum number m sub s

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

36

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

true

37

what is electron dot notation

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

38

what are the exceptions to Aufbau's Principle
when is stability achieved

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)

39

what elements follow exceptions to Aufbau's

Chromium down, Copper down

40

what does frequency=
wavelength=
energy=

c/y
c/v
hv
hc/y

41

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

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

42

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

it is equal to n or the subsidiary number

43

is this a possible combination of quantum numbers
n=6, l=5, m=-5, s=+1/2

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