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Flashcards in MCAT Chemistry 3 Deck (18):
1

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

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

3

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

4

Gibbs-Helmholtz Equation

Delta G = Delta H - T Delta S

5

Mole Fraction

Xa = na/n total or N a/ N total

6

State Function

a property that depends on only on the state of the system

7

Spin Quantum Number (ms)

describes spin of electronms = +1/2 or -1/2

8

Equilibrium G and Entropy

G at minimum , entropy at maximum

9

amu (1 dalton) =

the mass of one or one neutron

10

Avagadros number

the number of atoms in exactly 12 g of pure 12c and equal to 6.022 x 10^23 is called

11

Magnetic Quantum Number (m)

orbital orientation (px, pv, pz) m = -l to + l

12

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.

13

What is indicated by having the same number of valence electrons?

they have related chemical properties

14

Part per million (ppm)

moles of solute x 10⁶ / total mass of solution

15

Energy of ionization (energy required to detach an electron from a nucleus)

periodic trend: it increases going to the right and up

16

electron affinity (willingness of an atom atom to accept an additional electron)

periodic trend: it increases going to the right and up

17

electronegativity (tendency of an atom to attract an electron in a bond that it shares with anothe

periodic trend: it increases going to the right and up

18

Changes in Pressure to Products and reactants

only affects gases. can also be done by changing volume. moves toward side with lower # of moles