The hatchet state can be defined as a set of conditionsthat explain a human or point at a offered time. The is in thissense of words that researchers divide matter into the three statesshown in the figure below.

You are watching: Elements that are gas at room temperature

The three says of matter have actually characteristic properties. Solids have actually a distinctive shape. Once they melt, the resulting fluid conforms come the form of that container. Gases broaden to fill their containers.

There room two reasons for examining gases before liquids orsolids. First, the actions of gases is less complicated to describebecause most of the properties of gases execute not depend on theidentity of the gas. Us can because of this develop a model for a gaswithout worrying around whether the gas is O2, N2,H2, or a mixture of this gases. Second, a relativelysimple, however powerful, model well-known as the kinetic moleculartheory is available, which describes most that the behavior ofgases.

Elements orcompounds that space Gases in ~ Room Temperature

Before examining the ubraintv-jp.comical and physical nature ofgases, it might be valuable to ask: What type of aspects orcompounds are gases in ~ room temperature? To aid answer thisquestion, a list of some common compounds that are gases in ~ roomtemperature is provided in the table below.

Common Gases in ~ Room Temperature

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Element or link Atomic or Molecular weight
H2 (hydrogen) 2.02
He (helium) 4.00
CH4 (methane) 16.04
NH3 (ammonia) 17.03
Ne (neon) 20.18
HCN (hydrogen cyanide) 27.03
CO (carbon monoxide) 28.01
N2 (nitrogen) 28.01
NO (nitrogen oxide) 30.01
C2H6 (ethane) 30.07
O2 (oxygen) 32.00
PH3 (phosphine) 34.00
H2S (hydrogen sulfide) 34.08
HCl (hydrogen chloride) 36.46
F2 (fluorine) 38.00
Ar (argon) 39.95
CO2 (carbon dioxide) 44.01
N2O (dinitrogen oxide) 44.01
C3H8 (propane) 44.10
NO2 (nitrogen dioxide) 46.01
O3 (ozone) 48.00
C4H10 (butane) 58.12
SO2 (sulfur dioxide) 64.06
BF3 (boron trifluoride) 67.80
Cl2 (chlorine) 70.91
Kr (krypton) 83.80
CF2Cl2 (dichlorodifluoromethane) 120.91
SF6 (sulfur hexafluoride) 146.05
Xe (xenon) 131.30

There are number of patterns in the table above.

usual gases at room temperature encompass both elements (such together H2 and also O2) and also compounds (such together CO2 and NH3). facets that space gases in ~ room temperature space all nonmetals (such together He, Ar, N2, O2, and so on). Compounds that are gases in ~ room temperature space all covalent compounds (such together CO2, SO2, and also NH3) that contain two or more nonmetals. With just rare exception, this gases have relatively small molecule weights.

As a general rule, compounds that consist of reasonably light,covalent molecules are most most likely to it is in gases at roomtemperature.