molecular compounds of low molecular weight tend to be gases at room temperature?
336395
I'm not pretty sure about this but because of the low molecular weight, the attraction between molecules is little and therefore outside forces can easily scatter these molecules troughout space. This results in gas state rather than liquid or solid
957050
all things have a solid liquid and gas state. it just depends on the temperature.
49337
At room temperature, 0.968 g/cm³
81728
Diatomic, but not all diatomic gases are Halogens
809648
Nitrogen might be what you are looking for as it is a gas and is next to Oxygen in the periodic table so it has similar mass.\n\nBut as the person above has said, some kind of gaseous sulfur would have the closest properties to oxygen.
708251
You should expect a molecular compound to form between N and O (as opposed to an ionic compound).  This is because N and O are both nonmetals.  An ionic compound will form when a metal and a nonmetal combine.  I believe that this is what your question is getting at.
200691
A volutile substance has a high vapor pressure, and a non volatile substance has a low vapor pressure at room temperature. Obviously, volatility is a relative term and depends upon temperature and pressure. Volatility increases with increasing temperature and decreases with increasing pressure.\n\nHope this helps,\nUltimeaciax
916757
Transition metals are stable.  Mercury is a metallic liquid at room temperature.  Diamond and graphite are allotropes of carbon.  H, N, O, F, Cl, Br, I, At form diatomic molecules.  He, Ne,Ar, Kr, Xe, Rn are monoatomic gases at room temp.
840267
The word molecule tells you that it is a covalent compound (if it were ionic, it would be called a unit cell). Covalent compounds are USUALLY between nonmetals but in some cases can be between a metal and a non-metal. It all boils down to electronegativity difference (how much harder one atom is pulling on the electrons in question than the other atom). I hope this helps!
255271
Yes you are correct.Different substances are different because of  their molecular structure and the constituents of each molecule. Molecules are well bound together in solids than in fluids (gases and liquids). The molecules are free in gases.\n Further the molecules are not at rest and are in vibrations.When the substance is heated  the average energy of a molecule  increases which tend to decrease the bindings of the molecules.\nGenerally by heating , a substance  chnges from solid to liquid and then to gaseous state.We call this as physical change.\nWhen the energy is  strong enough to break the  molecules into its constituent elements new compounds are produced we call it as chemical change.\nIn effect heat  has many things to do with their bondings
504345
Nitrogen is a non-metal, gasous at room temperature (25 C).\nIt is a liquid at -196 degrees C, solid at -210 C\nGroup V (15), Period 2\nAtomic Mass of 14.
182958
Gas molecules aren't bonded to each other as well as those of a solid, and at some point, each substance theoretically has a maximum density.
533784
Farts are not a single molecule.  In fact, they are primarily aerosolized feces.  The smaller molecules that are a byproduct of digestion often become gaseous in the intestinal tract and are expelled as farts.\n\nThere are far too many possible compounds in farts to list them, but a popular one to talk about is methane.  Only 1/5th (or so?) of humans produce methane in their farts, a flammable molecule that doesn't smell particularly good.\n\nhere is a page with a similar but more detailed answer:\nhttp://www.heptune.com/farts.html
905373
if u are referring to expansion due to heating than the order of expansion of the substances from lowest to largest is solid, liquids, than gases. But a solid's expansion is extremely low, almost impossible to measure unless its a metal.
244944
Solid, there are only 2 elements that are liquid at room temperature, Mercury, and Bromine. 2 other elements will melt from the heat of your hand, (slightly above room temperature), Cesium and Gallium.
24312
Depends on temp and pressure, but at room temp, avg. pressure, helium's a gas
444782
Phosphine, arsine, and ammonia are all gases at ambient temperature and pressure.  But ammonia has a higher boiling point than the other 2, about -33 C.  All 3 are polar molecules.  But ammonia can form hydrogen bonds.  This increases the strength of the intermolecular forces, causing the liquid state to be more stable.