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1

Quantum numbers

a set of four numbers used to describe the properties in electrons in an atom

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2

Pauli exclusion principle

states that each electron in an atom has a unique set of 4 quantum numbers

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3

Principal quantum numbers symbol

n

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4

Principal quantum numbers numeric range

1, 2, 3, ..., infinity

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5

Principal quantum numbers electron property

energy level (how much energy the electron has); the larger the number, the higher the energy level

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6

Principal quantum numbers orbital property

size; the larger the number, the farther it is from the nucleus and the bigger it is

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7

Angular momentum quantum number symbol

ℓ

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8

Angular momentum quantum number numeric range

0, 1, ... n - 1

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Angular momentum quantum number electron property

energy sublevel

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Angular momentum quantum number orbital property

shape of orbital

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11

ℓ = 0

s sublevel, shaped like a sphere

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12

ℓ = 1

p sublevel, shaped like a dumbbell

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13

ℓ = 2

d sublevel, shaped like a cloverleaf or a dumbbell with a donut

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14

ℓ = 3

f sublevel, 3 known shapes

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15

Magnetic quantum number symbol

mℓ

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16

Magnetic quantum number numeric range

-ℓ, ..., 0, ..., +ℓ

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Magnetic quantum number electron property

orbital the electron occupies

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18

Magnetic quantum number orbital property

orientation in space

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19

Degenerate

things that have the same amount of energy

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20

Spin quantum number symbol

ms

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21

Spin quantum number numeric value

+1/2 or -1/2

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Spin quantum number electron property

spin; the direction of the spin of the electron when in a magnetic field +1/2, -1/2 are opposite spins

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23

Spin quantum number orbital property

N/A

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