List of Nonmetals

Nonmetal Elements

The highlighted elements are the nonmetal elements.

The nonmetal elements occupy the upper righthand 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 SYMBOLELEMENT
1HHydrogen
2HeHelium
6CCarbon
7NNitrogen
8OOxygen
9FFluorine
10NeNeon
15PPhosphorus
16SSulfur
17ClChlorine
18ArArgon
34SeSelenium
35BrBromine
36KrKrypton
53IIodine
54XeXenon
85AtAstatine
86RnRadon
117UusUnunseptium
118UuoUnunoctium
List of Nonmetals
Last modified: October 25th, 2016 by Todd Helmenstine

7 thoughts on “List of Nonmetals

  1. sahil

    very usefull stuff

    u could also add like in what natural state these exist
    like sulphur in S8 ,S6,S7
    oxygen in O2

  2. 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.

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