7/28/2019 Chemistry Exam Review

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Chemistry Exam Review

Equations

% error = /accepted - experimental/ * 100%

accepted

% by mass = mass of element * 100%

mass of compound

c = (Speed of Light: 3.0 * 10^8 m/s)

E = h (Energy = Plank's Constant (6.626 * 10^-34 J/Hz) * frequency)

= h/mv (describes an electron's wavelength), v = velocity, De Broglie

A-Z = neutrons (mass # - atomic # = neutrons)

6.02 * 10^23 molecules/mole

Isotope Notation

Hyphen Notation - ex. C-12 , use mass #

Nuclear Symbol Notation - mass # on top, atomic # below it

Trends

Metallic Character Electron Affinity Radius Ionization Energy

Principles

Schrdinger's Quantum Numbers

- n = energy level, l = sublevel, m = orbital, s = spin

- # of electrons in any energy level = 2n^2

- s:1, p:3, d:5, f:7

Aufbau Principle - lowest energy levels filled 1st

Pauli Exclusion Principle - electrons in same orbital have opposite spin Hund's Rule - one electron in each orbital before placing a 2nd one

Heisenberg Uncertainty Principle - position and velocity inversely related

People

Rutherford - positive nucleus

Milliken - charge of electron

Chadwick - neutron

Dalton - Atomic Theory, atoms are indivisible

Thomson - electron

Other Sublimation = solid => gas, Deposition = gas => solid

L = dm^3, mL = cm^3

Extensive Properties - depend on amount (mass, etc.), Intensive - conductivity, etc.

Precision - how close results are to each other, Accuracy - how close results are to

standard value

Radiation: (micro, radio, infrared), (ROY G. BIV), (UV, gamma, X-ray)

7/28/2019 Chemistry Exam Review

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giga (9), mega (6), kilo (3), deci (-1), centi (-2) , milli (-3), micro (-6), nano (-9), pico(-

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