Unit 3

Question 1

speed of light constant

Answer 1

2.9979 x 10^8 m/s

Question 2

Planck’s constant or h

Answer 2

h = 6.626 x 10^-34 J • s

Question 3

Planck’s or quantum

Answer 3

E = h v

v = nu = frequency

Question 4

photoelectric effect equation

Answer 4

E = hc/L

L=lambda=wavelength

Question 5

equation with mass and velocity

Answer 5

L = h/mv

Question 6

change in energy equation

Answer 6

-2.178 x 10^-18 (1/n^2 final - 1/n^2 initial)

Question 7

Bohr Model

Answer 7

-only robots of certain size
-an electron in orbit will not radiate
-energy is absorbed or released when and electron moved from 1 orbit to another

Question 8

n, principle quantum #

Answer 8

-size of orbital
-energy of orbital
-values: 1,2,3…

Question 9

l, angular quantum #

Answer 9

-shape
-values: 0,1,2,3…

Question 10

ms, magnetic spin #

Answer 10

-direction of spin of electron
-values: 1/2 cw, -1/2ccw

Question 11

ml, magnetic quantum #

Answer 11

-orientation
-values: -l, 0, l (subshell)

Question 12

s,p,d,f shapes

Answer 12

-sphere, peanut, double peanut, flower

Question 13

shells and max electrons for s,p,d,f

Answer 13

s = 1 subshell, 2 electrons max
p = 3 subshells, 6 electrons max
d = 5 subshells, 10 electrons max
f = 7 subshells, 14 electrons max

Question 14

pauling scale of F, O, Cl, N, C, H

Answer 14

F - 4.0
O - 3.5
Cl - 3.0
N - 3.0
C - 2.5
H - 2.1

Question 15

ionic bond

Answer 15

+ -, metal and non metal
strong, conductive

Question 16

covalent bonds

Answer 16

nonmetals, including H

Question 17

polar covalent

Answer 17

electrons are not shared equally, En>0.4

Question 18

non polar covalent

Answer 18

electrons are shared more equally, En<0.4

Question 19

single bonds

Answer 19

-long and weak
-1 signs bond

Question 20

double bonds

Answer 20

-middle of single and triple
-1 sigma and 1 pi bond

Question 21

triple bond

Answer 21

-short and strong
-1 sigma and 2 pi bonds

Question 22

sigma bond

Answer 22

overlap of electrons on orbital ON bonding axis

Question 23

pi bond

Answer 23

overlap of electrons on orbitals OFF the bonding axis

Question 24

when calculating energy change, what are 3 things that the answer should have?

Answer 24

-4 sig figs
-use + and - signs
-use J

Question 25

order of longest to shortest wavelength

Answer 25

radio micro IR visible UV x-rays gamma rays

Question 26

order of lowest frequency to highest

Answer 26

radio micro IR visible UV x-rays gamma rays

Question 27

order of low energy to highest energy

Answer 27

radio micro IR visible UV x-rays gamma rays

Question 28

Aufbau principle

Answer 28

fill electrons from lowest energy to highest energy

Question 29

Hund’s rule

Answer 29

add electrons cw then comes back to pair them

Question 30

Pauli exclusion principle

Answer 30

no 2 electrons in the same atom can have the same quantum #’s

Question 31

ionization energy

Answer 31

energy associated with removing 1 electron from a gaseous atom

Question 32

electron affinity

Answer 32

energy associated with adding 1 electrons from a gaseous atom

Question 33

VSEPR

Answer 33

-linear -trigonal planar: bent -tetrahedral: trigonal pyramid, bent -trigonal bipyramidal: seesaw, t-shaped, linear -octahedral: square pyramidal, square planar, t-shaped

Question 34

linear arrangement

Answer 34

-2 pairs -180 degrees -sp

Question 35

trigonal planar, bent

Answer 35

-3 pairs -120, <120 degrees -sp^2

Question 36

tetrahedral, trigonal pyramidal, bent

Answer 36

-4 pairs -109.5, <109.5, <109.5 degrees -sp^3

Question 37

trigonal bipyramidal, seesaw, t-shaped, linear

Answer 37

-5 pairs -90&120, <90&120, <90, 180 -sp^3d

Question 38

octahedral, square pyramidal, square planar, t-shaped

Answer 38

-6 pairs -90, <90, 90, <90 -sp^3d^2