MCAT Chemistry 3 Flashcards
Balmer Series
A set of spectral lines that appear in the visible light region when a hydrogen atom undergoes a transition from energy levels n>2 to n=2
Metalloids
B, Si, Ge, As, Sb, Te, and Po are called metalloids and have properties that are in between those of metals and nonmetals
representative elements
an element in an “A” group in the periodic table; as a group these elements display a wide range of physical and chemical properties. In their atoms, the s and p sublevels in the highest occupied energy level are partially filled
Gibbs-Helmholtz Equation
Delta G = Delta H - T Delta S
Mole Fraction
Xa = na/n total or N a/ N total
State Function
a property that depends on only on the state of the system
Spin Quantum Number (ms)
describes spin of electronms = +1/2 or -1/2
Equilibrium G and Entropy
G at minimum , entropy at maximum
amu (1 dalton) =
the mass of one or one neutron
Avagadros number
the number of atoms in exactly 12 g of pure 12c and equal to 6.022 x 10^23 is called
Magnetic Quantum Number (m)
orbital orientation (px, pv, pz)m = -l to + l
Collision Theory of Chemical Kinetics
Theory stating that the rate of a reaction is directly proportional to the number of collisions that take place between reactants per second.
What is indicated by having the same number of valence electrons?
they have related chemical properties
Part per million (ppm)
moles of solute x 10⁶ / total mass of solution
Energy of ionization (energy required to detach an electron from a nucleus)
periodic trend: it increases going to the right and up
