Chem 101 - First 36 elements and some constants

C (speed of light)

3.00 × 10^8

Avagadro’s #

6.022 * 10^23

H

Hydrogen

He

Helium

Li

Lithium

Be

Beryllium

B

Boron

C

Carbon

N

Nitrogen

O

Oxygen

F

Fluorine

Ne

Neon

Na

Sodium

Mg

Magnesium

Al

Aluminum

Si

Silicon

P

Phosphorus

S

Sulfur

Cl

Chlorine

Ar

Argon

K

Potassium

Ca

Calcium

Sc

Scandium

Ti

Titanium

V

Vanadium

Cr

Chromium

Mn

Manganese

Fe

Iron

Co

Cobalt

Ni

Nickel

Cu

Copper

Zn

Zinc

Ga

Gallium

Ge

Germanium

As

Arsenic

Se

Selenium

Br

Bromine

Kr

Krypton

Order of waves by wavelength (low to high)

gamma, x, UV, visible, infrared, radio

Dalton

Billiard Balls

Law of multiple prop.s

when two elements form two different compounds, the mass ratio in one compound is a whole # ratio times the mass ratio of the other

Curie

Radioactivity

Thompson

Cathode Ray Tube - electrons have specific charge

Chadwick

Neutrons

Rutherford, Geiger, Marsden

Nucleus - gold foil experiment

Mass defect

Mass of atom is slightly less than sum of all masses within atom

Isotopes

Same # protons, different # neutrons

Groups

Vertical columns on periodic table

Periods/rows

rows on periodic table

Group 1

Alkali Metals

Group 2

Alkaline Earth Metals

Group 16

Chalcogens

Group 17

Halides

Group 18

Noble Gasses

Mole

6.022 × 10^ 23

Speed of light

3 × 10^ 8

Wavelength to frequency formula

nu x lambda = c

Energy of a wave

E = h x nu

Planck’s Constant - h

6.626 × 10^ -34

Work function

amt of energy needed to kick an electron off

Monochromatic radiation

single wavelength released (laser)

Polychromatic radiation

many wavelengths

Rydberg formula

E = -R (1/n^ 2)

R

2.18 × 10^ -18

ground state

lowest energy - n = 1

Heisenberg uncertainty principle

can’t know momentum and position

De Broglie

lambda = h/(mv)

wave functions aka

orbitals

range of l

0 - (n-1)

range of m sub l

-l - l

shell

orbitals with same n

subshell

orbital with same n and l

node

place where there is no possibility of finding an electron

wave intensity (prob of electron)

amp ^ 2