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Flashcards in chem unit 4 test Deck (44)
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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