Quantum Number
name the 4 quantum numbers (and their symbols)
principle quantum number - n
angular momentum quantum number - l
magnetic quantum number - nl
spin quantum number - ms
what is the pauli exclusion principle
no two electrons have the same set of four quantum numbers
give an example of homogenous mixture
salt water, alcohol, etc
what are valence electrons
electrons found in the outermost shell of an atom
what type of bonding involves the sharing of electrons between non-metals
covalent
what possible values can each quantum number have
n - integers (1,2,3....)
l - 0 to n-1
ml - -1 to +1ms - -1/2 or +1/2
within a subshell, electrons do not pair up unless all orbitals in that subshell already contain one electron
which elements can form more than one type of cation
transition metals
what is shielding
inner electrons reduce the attraction between the nucleus and outer electrons
what is ionic bonding
type of bonding that forms from electrostatic attraction between oppositely charged ions
If n = 4, l = 2, what could ml be?
-2, -1, 0, 1, 2
what is the maximum number of electrons that can be found in each orbital
s = 2
p = 6
d = 10
f = 14
0.450 moles of Fe contains how many atoms?
Atoms = moles x Avogadro’s number
= 0.450 mol x 6.022 x 1023
= 2.71 x 10^23 atoms
what is effective nuclear charge
net positive charge experienced by an electron after shielding is considered
metals form what types of ions because they lose electrons easily
cations
are the following quantum numbers possible:
n = 1, l = 2, ml = -1, ms = 1/2
n= 3, l=2 , ml= 0, ms= -½
n= 2, l=0 , ml= -3, ms= +½
n= 4, l=3 , ml= -2, ms= +½
n= 3, l=0 , ml= 0, ms= -1
n = 1, l = 2, ml = -1, ms = 1/2 - NO
n= 3, l=2 , ml= 0, ms= -½ - Yes
n= 2, l=0 , ml= -3, ms= +½ - No
n= 4, l=3 , ml= -2, ms= +½ - Yes
n= 3, l=0 , ml= 0, ms= -1 - No
complete the electron configuration of Ru (44)
[Kr] 5s² 4d⁶
Pb(NO3) - yes, it is soluble
what type of ion has a larger radius than its neutral atom
anion
what property measures how strongly an atom attracts electrons in a bond
electronegativity
If you have a n of 2, what possible values can you have for all of the other quantum numbers?
l = 0, 1
ml = 1, 0, -1
ms = -1/2 or +1/2
what is barium's FULL electron configuration (unabbreviated)
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2
balance this equation:
___ C3H8 (g) + ___ O2 (g) → ___ CO2 (g) + ___ H2O (l)
1 C3H8 (g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O (l)
what trend explains why ionisation energy generally increases across a period from left to right
increasing nuclear charge
what type of bonding explains why metals conduct electricity due to mobile electrons
metallic bonding