1.2 atomic orbitals, electronic configurations & the periodic table Flashcards

1
Q

orbitals

A

stationary waves in an atom, vibrate in time
can hold a maximum of 2 electrons
spdf

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2
Q

principle quantum number

A

n
indicates an electron’s energy level

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3
Q

angular momentum quantum number

A

l
indicates the shape of the subshell
values from 0 to n-1

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4
Q

magnetic quantum number

A

Ml
indicates the orientation of the orbital
values between -l and +l

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5
Q

magnetic spin quantum number

A

Ms
indicates the direction of spin
values of either -1/2 or +1/2

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6
Q

s subshell

A

l = 0
holds 2 electrons maximum
1 value of Ml
spherical

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7
Q

p subshell

A

l = 1
holds 6 electrons maximum
3 values for Ml
dumbbell shaped

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8
Q

d subshell

A

l = 2
holds 10 electrons maximum
5 values for Ml

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9
Q

f subshell

A

l = 3
holds 14 electrons maximum
7 values for Ml

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10
Q

degenerate

A

orbitals of the same subshell have equal energy

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11
Q

pauli exclusion principle

A

no 2 electrons of the same atom can have the same set of 4 quantum numbers

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12
Q

what does the pauli exclusion principle mean?

A

orbitals hold a maximum of 2 electrons
each electron within an orbital must have opposite spins

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13
Q

aufbau principle

A

electrons fill orbitals in order of increasing energy

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14
Q

hund’s rule

A

when degenerate orbitals are available, electrons fill each singly, keeping their spins parallel before spin pairing starts

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15
Q

subshell stability

A

half-filled and fully-filled subshells are more stable than other incomplete subshells

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16
Q

vsepr theory step 1

A

take the number of valence electrons on the central atom

17
Q

vsepr theory 2

A

add an electron for each attached atom

18
Q

vsepr theory 3

A

add electrons for negative charges
subtract electrons for positive charges

19
Q

vsepr theory 4

A

divide by 2 for the number of electron pairs

20
Q

electron pair repulsion

A

negatively charged pairs repel each other so arrange to minimise repulsion and maximise separation

21
Q

highest electron pair repulsion

A

lone pair-lone pair

22
Q

lowest electron pair repulsion

A

bonding pair-bonding pair

23
Q

dative covalent bonds

A

form when both electrons in a covalent bond are from the same atom

24
Q

linear shaped molecules

A

2 bonding electron pairs
180° bond angle

25
trigonal planar shaped molecules
3 bonding electron pairs 120° bond angle
26
tetrahedral shaped molecules
4 bonding electron pairs 109.5° bond angle
27
angular shaped molecules
2 bonding electron pairs 2 lone electron pairs 104.5° bond angle
28
trigonal pyramidal shaped molecules
3 bonding electron pairs 1 lone electron pair 107° bond angle
29
trigonal bipyramidal shaped molecules
5 bonding electron pairs · 120° equatorial bond angle · 90° eq/ax bond angle · 180° axial bond angle
30
octahedral shaped molecules
6 bonding electron pairs 90° bond angle
31
square pyramidal shaped molecules
5 bonding electron pairs 1 lone electron pair 82° bond angle
32
square planar shaped molecules
4 bonding electron pairs 2 lone electron pairs 90° bond angle