Flashcards in Chapter 4 Pt.2 Test Deck (78):
did experimenting of cutting object in half
called this the atomus
(model is round and plain)
he dissappeared, along with his theories
all matter is made up of atoms
all atoms of an element are exactly alike
they're different than the atomus of any other element
matter is neither created nor destroyed in a chemical reaction
model of atom = spherical
realized there are + and - charges in an atom
he believed the whole atom was solid w/ all positives
called "-" charges, electrons
propelled alpha particles through gold foil
some alpha particles went through, or bounced back
ATOM IS EMPTY SPACE
ELECTRONS MOVE RANDOMLY AROUND NUCLEUS
it acts like a wave.
it reflects and refracts
what does every element produce when being burned?
when light is passed through a prism, it separates into what?
these wavelengths are ....
in an element, light is given off or absorbed as packets of energy
packets are "quantized"
they come in different sizes
a fan has 3 speeds
fast food meals come in regular or extra large sizes
Analogies for Quantize
example: "slider" for brightness on ipad -
packet of light energy -
Quantum's also know as ...
who created the Quantum Theory?
every electron has a fixed orbit
every electron has a location
every orbit has a # of electrons
farther from nucleus the more energy it takes to stay in orbits
normal location of an electron =
farther from nucleus.... the __________________ it takes to stay in orbit
can higher orbits exists even if there are no electrons located there?
what happens at step one of energy levels?
photon hits electron
electron absorbs and absorbs energy
electron absorbs energy
electron jumps to higher energy level
Step three -
unstable electron loses energy & returns to ground state
published Heisenberg Uncertainty Principle
said you can know electrons location&momentum, but not at same time -
showed that u can calculate the probability of an electron being in a certain location
-don't know exactly the location of electron
-you can know probability of area where it should be
Schrodinger and Born?
Quantum mechanical model... also known as -
wave mechanical model
Quantum mechanical model combines ideas from ....
Quantum Mechanical Model:
electrons are in the ______ ________.
Quantum Mechanical Model:
-limited _________ in energy level
energy levels have sub levels called ...
what are the 4 different quantities -
n = ?
which energy level?
L = ?
shape of orbital
m = ?
where on x & y axis?
s = ?
spin up or down
Principle Energy Level = ....
n describes how ______ an electrons orbit is from the _________.
N can be divided into sublevels ....
sub level ... = ....
it's the region of space where there is 90% chance of finding the electron -
orbital and orbits do NOT mean the same thing.
energy level # of orbitals Orbital Names
n= 4 L=4 4s 4p 4u 4f
n=1 L=1 1s
every energy level (n) has same number of _________ (l).
s goes with the ______ orbital
p goes with the _______ orbital
u goes with the _______ orbital
f goes with the _______ orbital
who did Einstein disagree with??
Heisenberg and Bohr
they held conferences. and there was a lot of tension between who?
Bohr and Einstein
S looks like a ....
p = "pinched" so looks like....
d = "down on the ground" =
four leaf clover
f = ...
far too complicated
8 going sideways (acrossed the x-axis)
how many orbitals in "d" orbital?
how many f orbitals are therE?
what orbital tells u the orientation in space of each orbitals -
what orbital tells u the spin of the electrons movement?
each orbital can hold no more than ________ electrons
electrons must have ___________ spin
one _______, and one _________.
up / down
electrons fill in orbitals starting at the lowest energy level
"electrons are lazy"
place one electron in each empty orbital in an energy level before you add a second electron to that orbital -
no more than 2 electrons may occupy an orbital & must have opposite spins -
Pauli Exclusion Act
a maximum of ______ electrons may occupy a single orbital, but only if the electrons have __________ spins
Quantum Mechanical Model of the Atom =
electrons located in energy levels
electrons are located by 4 _________ ___________.
limited # of ___________ per energy __________.
its the fixed amount of energy -
what are the 4 quantum #'s -
define orbitals -
sublevels in energy levels
what is the relationship between the principle energy level and the number of orbitals -
n = l
what orbitals are present if n = 3