Vocab Flashcards

1
Q

observation

A

knowledge received through senses or instrumentation

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2
Q

fact

A

known to be consistent with reality

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3
Q

law

A

summarizes past observations, predicts future ones

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4
Q

hypothesis

A

tentative interpretation, can be tested through observation

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5
Q

theory

A

an explanation about the world that has been ‘proven’ by experiments/facts gathered over time

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6
Q

accurate

A

close to the ‘correct’ value being measured

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7
Q

precise

A

measurements that are close together and repeatable

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8
Q

homonuclear

A

molecule of atoms of the same type

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9
Q

heteronuclear

A

molecule of atoms of different types

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10
Q

law of conservation of mass

A

mass is neither created or destroyed

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11
Q

law of definite proportions

A

all compounds of the same kind will always have the same ratio of elements

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12
Q

law of multiple proportions

A

compounds will always give ratio of elements in small, whole numbers

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13
Q

cathode ray experiment

A

discovered charge/mass ratio of electrons

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14
Q

oil drop experiment

A

determined separate charge and mass of electrons

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15
Q

gold foil experiment

A

discovered positively charged nucleus at center of atom

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16
Q

bombardment experiment

A

discovered neutrons in the nucleus

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17
Q

heisenberg’s uncertainty principle

A

you cannot know position and momentum of an object at the same time

18
Q

pauli exclusion principle

A

electrons cannot have identical quantum values, e.g one must be spin up and the other spin down, and only two electrons can fill an orbital

19
Q

aufbau principle

A

fill electrons from lowest to highest energy

20
Q

hund’s rule

A

each electron get’s its own room before pairing up with another

21
Q

isoelectric

A

species that have the same electron configuration

22
Q

paramagnetic

A

electron configurations with unpaired electrons

23
Q

diamagnetic

A

electron configurations with NO unpaired electrons, all orbitals are completely filled

24
Q

photoelectric effect

A

electrons ejected when light is shined on metal surface (brighter light = more electrons)

25
double-slit diffraction
wave interferes with itself and pattern of peaks emerges
26
electromagnetic radiation
light is made up of oscillating electric and magnetic waves
27
constructive interference
waves line up, amplitudes double
28
destructive interference
waves are not lined up, cancel each other out
29
schrodingers cat
until you observe a system, it is in a superposition of all states (cat is alive and dead at the same time)
30
degeneracy
states with the same energy
31
coulomb's law
potential energy due to electron attractions and repulsions
32
shielding
valence electrons do not feel as strong of a pull from the nucleus due to other electrons "in the way"
33
penetration
lower l value, better penetration
34
ionic bonding
electrostatic forces holding atoms together, "donating" electrons
35
covalent bonding
sharing of electrons
36
metallic bonding
"sea of electrons" holding atom together
37
resonance
more than one acceptable lewis structure
38
steric number
number of atoms and lone pairs bonded to central atom, total # of lines and dots
39
how to count VESPR
any kind of bond = 1, lone pair = 1
40
radical molecule
uneven number of valence electrons