List of Nonmetals 11


Periodic Table Nonmetals - 2017

The highlighted elements are the nonmetal elements.

The nonmetal elements occupy the upper right-hand corner of the periodic table. These elements have similar chemical properties that differ from the elements considered metals.

The nonmetal element group is a subset of these elements. The nonmetal element group consists of hydrogen, carbon, nitrogen, oxygen, phosphorus, sulfur and selenium.

Hydrogen acts as a nonmetal at normal temperatures and pressure and is generally accepted to be part of the nonmetal group.

Properties of nonmetals include:

  • dull, not shiny
  • poor conductor of heat
  • poor conductor of electricity
  • high ionization energies
  • high electronegativity
  • not malleable or ductile, usually brittle
  • lower density (when compared to metals)
  • lower melting point and boiling points (when compared to metals)
  • gains electrons in reactions

This is a list of the nonmetal elements in order of increasing atomic number.

 NUMBER  SYMBOL ELEMENT
1 H Hydrogen
2 He Helium
6 C Carbon
7 N Nitrogen
8 O Oxygen
9 F Fluorine
10 Ne Neon
15 P Phosphorus
16 S Sulfur
17 Cl Chlorine
18 Ar Argon
34 Se Selenium
35 Br Bromine
36 Kr Krypton
53 I Iodine
54 Xe Xenon
85 At Astatine
86 Rn Radon
117 Ts Tennessine
118 Og Oganesson

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11 thoughts on “List of Nonmetals

  • Daniel Rosenthal

    Most metalloids are semiconductors–they have a small electrical conductivity which
    increases as their temperature is raised or impurities are added. The exceptions are
    arsenic and antimony. These elements exhibit an extreme form of allotropy; the room
    temperature allotropes, although brittle are metallc conductors (specific resistivity:
    arsenic 35 micro-ohm-cm; antimony 42 micro-ohm cm–but they have nonmetallic,
    nonconducting allotropes at low temperatures. By contrast, Germanium has a
    specific resistivity of 60 ohm-cm or 60,000,000 micro-ohm cm; tellurium, 430,000
    micro-ohm-cm. Quite a difference. In metals, electrical conductivity decreases
    slightly as temperature increases and decreases if it is lowered. Some metals–e.g.
    tin and lead–lose ALL of their electrical resistance at low temperatures and become
    perfect electrical conductors–a phenomenon known as superconductivity. An
    experiment was done a few years ago where an electrical current was started in a
    lead ring. Three years later it was still circulating undiminished. Of course this
    phenomenon only takes place at very low temperatures–just a few degrees above
    absolute zero.