# Table of Common Constants

Series of different colored lasers. No matter the color, the speed of light is a constant. The speed of light is just one constant in this table of common constants. Credit: Pang Ka kit, Creative Commons

Here is a useful table of common constants. These physical constants appear time and again in chemistry and physics homework problems.

Why memorize them when you can just look them up.

I personally prefer to keep a sheet with these constants stuffed in the back of book. You can print up your own sheet with a PDF copy of the Table of Common Constants.

### TABLE OF COMMON CONSTANTS

 Name Symbol Value Speed of light c 299792458 m⋅s-1 Charge of an electron e 1.602176565(35)×10−19 C Universal gravitational constant G 6.67384(80)×10-11 N⋅m2/kg2 Planck’s constant h 6.626070040(81)×10−34 J⋅s h 4.135667662(25)×10−15 eV⋅s Dirac’s constant ħ 1.054571800(13)×10−34 J⋅s ħ 6.582119514(40)×10−16 eV⋅s Boltzmann’s constant k 1.3806488(13)×10−23 J⋅K-1 8.6173324(78)×10−5 eV⋅K-1 Avogadro’s constant NA 6.022140857(74)×1023 mol−1 Faraday’s constant F 96485.3365(21) C⋅mol−1 Ideal gas constant R 8.3144621(75) J⋅K−1⋅mol−1 Mass of an electron me 9.10938291(40)×10−31 kg 0.510998928(11) MeV/c2 Mass of a proton mp 1.672621777(74)×10−27 kg 938.272046(21) MeV/c2 Mass of a neutron mn 1.674927351(74)×10−27 kg 939.565378(21) MeV/c2 Atomic mass unit u, amu or Da 1.660538921(73)×10−27 kg 931.494061(21) MeV/c2 Permittivity of free space ε0 8.854187817×10−12 Coulomb’s constant 1/4πε0 8.9875517973681764×109 N⋅m2⋅C-2 Permeability of free space μ0 4π×10−7 N⋅A-2 Rydberg constant R∞ 1.0973731568539(55)×10−7 m-1 Bohr radius a0 5.2917721092(17)×10−11 m

# List of Electronegativity Values of the Elements

Electronegativity is a chemical property which describes how well an atom can attract an electron to itself. Values for electronegativity run from 0 to 4. Electronegativity is used to predict whether a bond between atoms will be ionic or covalent. It can also be used to predict if the resulting molecule will be polar or nonpolar. This table is a list of electronegativity values of the elements.

Click the periodic table to view this list in periodic table form.

 NUMBER SYMBOL ELEMENT ELECTRONEGATIVITY 1 H Hydrogen 2.20 2 He Helium no data 3 Li Lithium 0.98 4 Be Beryllium 1.57 5 B Boron 2.04 6 C Carbon 2.55 7 N Nitrogen 3.04 8 O Oxygen 3.44 9 F Fluorine 3.98 10 Ne Neon no data 11 Na Sodium 0.93 12 Mg Magnesium 1.31 13 Al Aluminum 1.61 14 Si Silicon 1.90 15 P Phosphorus 2.19 16 S Sulfur 2.58 17 Cl Chlorine 3.16 18 Ar Argon no data 19 K Potassium 0.82 20 Ca Calcium 1.00 21 Sc Scandium 1.36 22 Ti Titanium 1.54 23 V Vanadium 1.63 24 Cr Chromium 1.66 25 Mn Manganese 1.55 26 Fe Iron 1.83 27 Co Cobalt 1.88 28 Ni Nickel 1.91 29 Cu Copper 1.90 30 Zn Zinc 1.65 31 Ga Gallium 1.81 32 Ge Germanium 2.01 33 As Arsenic 2.18 34 Se Selenium 2.55 35 Br Bromine 2.96 36 Kr Krypton 3.00 37 Rb Rubidium 0.82 38 Sr Strontium 0.95 39 Y Yttrium 1.22 40 Zr Zirconium 1.33 41 Nb Niobium 1.6 42 Mo Molybdenum 2.16 43 Tc Technetium 1.9 44 Ru Ruthenium 2.2 45 Rh Rhodium 2.28 46 Pd Palladium 2.20 47 Ag Silver 1.93 48 Cd Cadmium 1.69 49 In Indium 1.78 50 Sn Tin 1.96 51 Sb Antimony 2.05 52 Te Tellurium 2.1 53 I Iodine 2.66 54 Xe Xenon 2.6 55 Cs Cesium 0.79 56 Ba Barium 0.89 57 La Lanthanum 1.10 58 Ce Cerium 1.12 59 Pr Praseodymium 1.13 60 Nd Neodymium 1.14 61 Pm Promethium 1.13 62 Sm Samarium 1.17 63 Eu Europium 1.2 64 Gd Gadolinium 1.2 65 Tb Terbium 1.22 66 Dy Dysprosium 1.23 67 Ho Holmium 1.24 68 Er Erbium 1.24 69 Tm Thulium 1.25 70 Yb Ytterbium 1.1 71 Lu Lutetium 1.27 72 Hf Hafnium 1.3 73 Ta Tantalum 1.5 74 W Tungsten 2.36 75 Re Rhenium 1.9 76 Os Osmium 2.2 77 Ir Iridium 2.2 78 Pt Platinum 2.28 79 Au Gold 2.54 80 Hg Mercury 2.00 81 Tl Thallium 1.62 82 Pb Lead 2.33 83 Bi Bismuth 2.02 84 Po Polonium 2.0 85 At Astatine 2.2 86 Rn Radon no data 87 Fr Francium 0.7 88 Ra Radium 0.89 89 Ac Actinium 1.1 90 Th Thorium 1.3 91 Pa Protactinium 1.5 92 U Uranium 1.38 93 Np Neptunium 1.36 94 Pu Plutonium 1.28 95 Am Americium 1.3 96 Cm Curium 1.3 97 Bk Berkelium 1.3 98 Cf Californium 1.3 99 Es Einsteinium 1.3 100 Fm Fermium 1.3 101 Md Mendelevium 1.3 102 No Nobelium 1.3 103 Lr Lawrencium no data 104 Rf Rutherfordium no data 105 Db Dubnium no data 106 Sg Seaborgium no data 107 Bh Bohrium no data 108 Hs Hassium no data 109 Mt Meitnerium no data 110 Ds Darmstadtium no data 111 Rg Roentgenium no data 112 Cn Copernicium no data 113 Uut Ununtrium no data 114 Fl Flerovium no data 115 Uup Ununpentium no data 116 Lv Livermorium no data 117 Uus Ununseptium no data 118 Uuo Ununoctium no data

# Trig Identities Study Sheet

This study sheet has ten groups of trig identities for the basic trigonometry functions. These identities include the reciprocal and co-function relationships between trig functions. There are also half-angle and double angle identities, along with sum and product relationships. This table is an extremely useful thing to keep on hand when working with trig functions. Print a copy and keep it with your textbook today.

This table contains values for sine, cosine and tangent for angles between 0 and 90º. All values are rounded to four decimal places.

The downloadable trig table PDF is optimized to fit on a single 8½ x 11″ sheet of paper.

# Element List in Spanish

Have you ever wondered if the names of elements are the same in other languages? Different languages have different words for the same thing, why should the elements be any different?

This table is a list of the elements in English and Spanish arranged by atomic number.

If you’d like to see a periodic table in Spanish, check out this Periodic Table, or Tabla Periódica de los Elementos in Spanish.

# Element List in German

Have you ever wondered if the names of elements are the same in other languages? Different languages have different words for the same thing, why should the elements be any different?

This table is a list of the elements in English and German arranged by atomic number.

If you’d like to see a periodic table in German, check out this Periodic Table, or Periodensystems der Elemente in German.

# 20 Amino Acids

Amino acids are organic compounds containing an amino group (-NH2) and a carboxyl group (-COOH). This is the general structure of an amino acid:

where R is the side chain functional group that distinguishes one amino acid from another.

This is a table of the 20 amino acids derived from proteins. The table contains the amino acid’s name, common abbreviation and symbol, linear structure and skeletal structure.

 Name Symbol Linear Structure Skeletal Structure Alanine ala A CH3-CH(NH2)-COOH Arginine arg R HN=C(NH2)-NH-(CH2)3-CH(NH2)-COOH Asparagine asn N H2N-CO-CH2-CH(NH2)-COOH Aspartic Acid asp D HOOC-CH2-CH(NH2)-COOH Cysteine cys C HS-CH2-CH(NH2)-COOH Glutamic Acid glu E HOOC-(CH2)2-CH(NH2)-COOH Glutamine gln Q H2N-CO-(CH2)2-CH(NH2)-COOH Glycine gly G NH2-CH2-COOH Histidine his H NH-CH=N-CH=C-CH2-CH(NH2)-COOH Isoleucine ile I CH3-CH2-CH(CH3)-CH(NH2)-COOH Leucine leu L (CH3)2-CH-CH2-CH(NH2)-COOH Lysine lys K H2N-(CH2)4-CH(NH2)-COOH Methionine met M CH3-S-(CH2)2-CH(NH2)-COOH Phenylalanine phe F Ph-CH2-CH(NH2)-COOH Proline pro P NH-(CH2)3-CH-COOH Serine ser S HO-CH2-CH(NH2)-COOH Threonine thr T CH3-CH(OH)-CH(NH2)-COOH Tryptophan trp W Ph-NH-CH=C-CH2-CH(NH2)-COOH Tyrosine tyr Y HO-Ph-CH2-CH(NH2)-COOH Valine val V (CH3)2-CH-CH(NH2)-COOH

Amino acids are often grouped by the chemistry of the side chain. These groups are polar-uncharged, polar-charged and non-polar.

Eight of the 20 amino acids are polar-uncharged: Asparagine, cysteine, glutamine, histidine, serine, threonine, tryptophan and tyrosine.

Eight of the 20 amino acids are non-polar: alanine, glycine, isoleucine, leucine, methionine, phenylalanine, proline, and valine.

The final four are polar-charged: arginine, aspartic acid, glutamic acid, and lysine.