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Terms in this set (18)
Why is the relationship between atomic radius and Z* inverse?
They have an inverse relationship because the greater the effective nuclear charge, the more strongly the outermost electrons are attracted to the nucleus, and the smaller the atomic radius.
Why is the relationship between Z* and first ionization energy proportional?
As you move across a row, z* increases meaning electrons are held tightly to the positive nucleus, so IE also increases because the energy required to remove a valence electron increases.
Why do Z* and atomic radius not have a relationship for atoms in the same column?
The Z* calculation doesn't capture that the principal quantum number of each of the atoms in a column is different, and principal quantum number affects an electrons distance from the nucleus which affects atomic size.
Why do Z* and IE not have a relationship for atoms in the same column?
The fundamental thing that is not captured in the Z* calculation is that the principalquantum number of each of these atoms (H, Li, Na, K, Rb, Cs) is different. Ionization energy decreases in a column as the atom gets farther from the nucleus. It isn't sufficient to consider nuclear charge without considering atom size and distance of the electron from the nucleus.
formula for volume of a sphere
Where do atoms come into contact in simple cubic?
midpoint of each edge
Where do atoms come into contact in body center cubic?
along body diagonal
difference between d infinity h and c infinity v
d infinity h can perform inversion and still be symmetrical, c infinity v can't
What is a symmetry element?
a point line or plane that shows where there is an aspect of symmetry
What is a symmetry operation?
a physical movement performed in reference to an element where you can't tell after that something has been done
symbol for c2, c3, c4. c5, c6, infinity
c2 is a eye shape, triangle, square, pentagon, hexagon, circle
describe difference between sigma h, sigma v, and sigma d
sigma h- symmetry plane of reflection perpendicular to principal axis
sigma v- plane containing axis that go thru more atoms
sigma d- plane bisecting two c2 axes Sometimes these also bisect σv planes, in which case vertical planes go through more atoms;dihedral planes go through less atom
delta g equation
4 al eqns
lewis acid v base
electron pair acceptor- acid
electron pair donor- base
how do inductive effects affect the strength of acid v base
acid- electron withdrawing make stronger
base- donating group makes stronger
softer vs hard
softer- bigger, more e-
FCC coordination number, octahedral and tetrahedral holes and where
12, 4 (edge center and center center), 8 (middle of 8 smaller cubes)
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