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Nonmetals
Chemical Properties, Physical Properties and General Information


Radioactive Material Sign
Radioactive Natural Element
Radioactive Material Sign
Radioactive Synthetic Element
Toxic Material Sign
Toxic Element
Name Sym. No. Atomic
Weight
Melting
Point
Boiling
Point
Phase Density Valence
Electrons
Oxidation
States
Hydrogen H 1 1.00794 -259.14 C -252.87 C Gas 0.08988 g/L 1s1 1, -1
(amphoteric oxide)
Carbon C 6 12.0107 3550C 3800 C Solid 2.267 g/cm3 2s2 2p2 +4, -4, +2
(mildly acidic oxide)
Nitrogen N 7 14.0067 -210.00 C -195.79 C Gas 1.251 g/L 2s2 2p3 3, +5, +4, -2
(strongly acidic oxide)
Oxygen O 8 15.9994 -218.79 C -182.95 C Gas 1.429 g/L 2s2 2p4 -2, -1
(neutral oxide)
Phosphorus Toxic Element P 15 30.973762 44.2 C 277 C Solid 1.82 g/cm3 3s2 3p3 3, +5, +4
(mildly acidic oxide)
Sulfur S 16 32.065 115.21 444.6 C Solid 2.067 g/cm3 3s2 3p4 -1, 2, +4, 6
(strongly acidic oxide)
Selenium Toxic Element Se 34 78.96 221 C 685 C Solid 4.809 g/cm3 4s2 4p4 2, +4, +6
(strongly acidic oxide)
Halogens - Group 17 of the Periodic Table
Fluorine Toxic Element F 9 18.9984032 -219.62 C -188.12 C Gas 1.7 g/L 2s22p5 -1 (strongly acidic oxide)
Chlorine Toxic Element Cl 17 35.453 -101.5 C -34.04 C Gas 3.2 g/L 3s23p5 1, 3, 5, 7
(strongly acidic oxide)
Bromine Toxic Element Br 35 79.904 -7.3 C 58.8 C Liquid 3.1028 g/cm3 4s24p5 1, 5
(strongly acidic oxide)
Iodine Toxic Element I 53 126.904 113.7 C 184.3 C Solid 4.933 g/cm3 5s25p5 1, 5, 7
(strongly acidic oxide)
Astatine At 85 210 302 C 337 C Solid 7 g/cm3 6s26p5 1, 3, 5, 7
Ununseptium Uus 117 294 ? Unknown Unknown Solid ? Unknown 7s27p5 N/A
Noble Gases - Group 18 of the Periodic Table
Helium He 2 4.002602 -272.2 C -268.93 C Gas 0.1786 g/L 1s2 0
Neon Ne 10 20.1797 -248.59 C -246.08 C Gas 0.9002 g/L 2s22p6 0
Argon Ar 18 39.948 -189.35 C -185.85 C Gas 1.784 g/L 3s23p6 0
Krypton Kr 36 83.798 -157.36 C -153.22 C Gas 3.749 g/L 4s24p6 +2
Xenon Xe 54 131.293 -111.7 C -108.12 C Gas 5.894 g/L 5s25p6 rarely more than 0
Radon Radioactive Natural Element Toxic Element Rn 86 222 -71.15 C -61.85 C Gas 9.73 g/L 6s26p6 0
Ununoctium Radioactive Synthetic Element Uuo 118 294 Unknown Unknown Gas Unknown 7s27p6 ? 0

Nonmetals: Unlike metals, which are electrically and heat conductive, nearly all nonmetals are either insulators or semiconductors and poor conductors of heat. Non-metals are usually unreactive. They can be either solid, liquid or gas. Their solid forms are more commonly brittle and not ductile like metals. They usually have lower densities and melting points than metals.



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