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This is a list of the chemical elements, sorted by density measured at standard temperature and pressure. (The first elements from hydrogen to radon are gases at normal room temperatures.)

Name Symbol Density (g/cm³) Atomic number Description/Mohs' hardness Color Notes
Hydrogen H 0.00008988 1 gas diatomic
Helium He 0.0001785 2 gas
HeTube
lowest boiling and melting pts
Neon Ne 0.0008999 10 noble gas
NeTube
Nitrogen N 0.0012506 7 gas diatomic
Oxygen O 0.001429 8 gas diatomic
Fluorine F 0.001696 9 halogen gas yellow-green or yellowish brown
Argon Ar 0.0017837 18 noble gas
ArTube
Chlorine Cl 0.003214 17 halogen gas yellowish green or greenish yellow
Krypton Kr 0.003733 36 noble gas
KrTube
forms compounds with fluorine and clathrates with water
Xenon Xe 0.005887 54 noble gas
XeTube
Radon Rn 0.00973 86 noble gas radioactive, comes from radium
Lithium Li 0.534 3 0.6
Li,3

silvery white/gray

use it in batteries
Potassium K 0.862 19 0.4
K,19

silvery white

forms lots of compounds
Sodium Na 0.971 11 0.5
Na,11

waxy, silvery white

burns with a yellow flame, reacts violently with water and oxidizes in air necessitating storage in an inert environment
Rubidium Rb 1.532 37 0.3
Rb,37

silvery-white

Calcium Ca 1.54 20 1.75
Ca,20

gray

Magnesium Mg 1.738 12 2.5
MagnesiumMetalUSGOV

silvery metallic

is very brittle
Phosphorus P 1.82 15 nonmetal
P,15

waxy white/ red/ black/ colorless

Due to its high reactivity, it is never found as a free element in nature.
Beryllium Be 1.85 4 brittle 5.5
Be,4

gray metallic

Francium Fr 1.87 87 radioactive alkali metal alkali metal isotope found in uranium and thorium ores
Caesium Cs 1.873 55 0.2
Cs,55

silvery gold

liquid at or near room temperature.
Sulfur S 2.067 16 2.0
Sulfur

lemon yellow

Carbon C 2.267 6 (graphite) 1-2 (diamond) 10.0
C,6

black or colorless when diamond

Silicon Si 2.3296 14 metalloid
Silizium pulver

dark gray, bluish tinge

Boron B 2.34 5 9.3
B,5

black/brown/ amorphous boron is a brown powder, metallic boron is black.

The metallic form is hard (9.3 on Mohs' scale) and a poor conductor at room temperature.
Strontium Sr 2.64 38 1.5
Sr,38

a soft silver-white or yellowish metallic element

The metal turns yellow when exposed to air. somewhat malleable. It is chiefly employed (as in the nitrate) to color pyrotechnic flames red.
Aluminium Al 2.698 13 2.75
Al,13

silvery

non-magnetic, high reflectance
Scandium Sc 2.989 21 transition metal
Sc,21

soft, silvery, develops a slightly yellowish or pinkish cast when exposed to air.

not attacked by a 1:1 mixture of nitric acid(HNO3) and 48% HF
Bromine Br 3.122 35 halogen
Br,35

gas/liquid: red-brown solid: metallic luster

a red volatile liquid at standard room temperature. This element is corrosive to human tissue
Barium Ba 3.594 56 1.25
Ba,56

metallic

Naturally occurring barium is a mix of seven stable isotopes. There are twenty-two isotopes known, but most of these are highly radioactive and have half-lifes in the several millisecond to several minute range. The only notable exceptions are 133Ba which has a half-life of 10.51 years, and 137mBa (2.6 minutes).
Yttrium Y 4.469 39 transition metal
Y,39

silvery metallic

two of its compounds are used to make the red color phosphors in cathode ray tube displays
Titanium Ti 4.540 22 6.0
Ti,22

silvery metallic

corrosion-resistant (including resistance to sea water and chlorine, high tensile strength
Selenium Se 4.809 34 2.0
Se,34

gray, metallic luster

Selenium has at least 29 isotopes, of which 5 are stable, and 6 are nuclear isomers.
Iodine I 4.93 53 halogen solid that sublimes at standard temperatures into a purple-pink gas that has an irritating odor
I,53

violet-dark gray, lustrous

least reactive of the halogens
Europium Eu 5.243 63 lanthanide
Eu,63
Germanium Ge 5.323 32 6.0
Germanium
Radium Ra 5.50 88 almost pure white, readily oxidizes on exposure to air, turning black Radium preparations are remarkable for maintaining themselves at a higher temperature than their surroundings, and for their radiations: alpha particles, beta particles, and gamma rays. Radium also produces neutrons when mixed with beryllium.
Arsenic As 5.776 33 3.5
As,33

metallic gray, allotropic forms; yellow, black and grey

poisonous
Gallium Ga 5.907 31 1.5
Gallium1 640x480
Vanadium V 6.11 23 7.0
V,23
Lanthanum La 6.145 57 2.5
La,57
Tellurium Te 6.232 52 2.25
Te,52

silvery lustrous gray

Zirconium Zr 6.506 40 5.0
Zr,40
Antimony Sb 6.685 51 3.0
Sb,51

silvery lustrous grey

Cerium Ce 6.770 58 2.5
Ce,58

resembles iron

Praseodymium Pr 6.773 59 soft
Pr,59

silvery white, yellowish tinge

Ytterbium Yb 6.965 70
Astatine At Approximately 7 85
Neodymium Nd 7.007 60
Zinc Zn 7.134 30
Chromium Cr 7.15 24
Promethium Pm 7.26 61
Tin Sn 7.287 50 soft metal
Indium In 7.310 49 soft metal
Manganese Mn 7.44 25
Samarium Sm 7.52 62
Iron Fe 7.874 26 metal
Gadolinium Gd 7.895 64
Terbium Tb 8.229 65
Dysprosium Dy 8.55 66
Niobium Nb 8.570 41
Cadmium Cd 8.69 48
Holmium Ho 8.795 67
Cobalt Co 8.86 27
Nickel Ni 8.912 28
Copper Cu 8.933 29
Erbium Er 9.066 68
Polonium Po 9.32 84
Ununhexium Uuh >9.32 116
Thulium Tm 9.321 69
Bismuth Bi 9.807 83
Ununpentium Uup >9.807 115
Lutetium Lu 9.84 71
Lawrencium Lr >9.84 103
Actinium Ac 10.07 89 radioactive metallic element. glows in the dark with an eerie blue light.
Molybdenum Mo 10.22 42
Silver Ag 10.501 47
Lead Pb 11.342 82
Ununquadium Uuq >11.342 114
Technetium Tc 11.50 43
Thorium Th 11.72 90
Thallium Tl 11.85 81
Ununtrium Uut >11.85 113
Palladium Pd 12.020 46
Ruthenium Ru 12.37 44
Rhodium Rh 12.41 45
Hafnium Hf 13.31 72
Einsteinium Es 13.5 (Estimate) 99
Curium Cm 13.51 96
Mercury Hg 13.5336 80
Ununbium Uub >13.5336 112
Americium Am 13.69 95
Berkelium Bk 14.79 97
Californium Cf 15.10 98
Protactinium Pa 15.37 91
Tantalum Ta 16.654 73
Rutherfordium Rf 18.1 104
Uranium U 18.95 92
Tungsten W 19.25 74
Gold Au 19.282 79
Roentgenium Rg >19.282 111
Plutonium Pu 19.84 94
Neptunium Np 20.25 93
Rhenium Re 21.02 75
Platinum Pt 21.46 78
Darmstadtium Ds >21.46 110
Iridium Ir 22.56 77
Osmium Ir 22.59 76
Seaborgium Sg 35 (Estimate) 106
Meitnerium Mt 35 (Estimate) 109
Bohrium Bh 37 (Estimate) 107
Dubnium Db 39 (Estimate) 105
Hassium Hs 41 (Estimate) 108
Fermium Fm Unknown 100
Mendelevium Md Unknown 101
Nobelium No Unknown 102
Ununoctium Uuo Unknown 118

Periodic tables

Standard table | Vertical table | Table with names | Names and atomic masses (large) | Names and atomic masses (small) | Names and atomic masses (text only) | Inline F-block | Elements to 218 | Electron configurations | Metals and nonmetals | Table by blocks | Alternatives

Lists of elements

Name | Atomic symbol | Atomic number | Boiling point | Melting point | Density | Atomic mass

Groups:   1 -  2 -  3 -  4 -  5 -  6 -  7 -  8 -  9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18
Periods:  1  -  2  -  3  -  4  -  5  -  6  -  7  -  8  -  9
Series:   Alkalis  -  Alkaline earths  -  Lanthanides  -  Actinides  -  Transition metals  -  Poor metals  -  Metalloids  -  Nonmetals  -  Halogens  -  Noble gases
Blocks:  s-block  -  p-block  -  d-block  -  f-block  -  g-block


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This page uses content from Wikipedia.
The original article was at List of elements by density. The list of authors can be seen in the page history. As with Chemistry, the text of Wikipedia is available under the GNU Free Documentation License.