does the element silicon expand when it freezes?
362248
Listen to IBL.  Metaraison's first and last sentences were right, but the transition from gas to solid is called deposition, not freezing.\n\nNames for phase transisitions:\ngas to liquid: condensation\nliquid to gas: boiling\ngas to solid: deposition\nsolid to gas: sublimation\nliquid to solid: freezing\nsolid to liquid: melting
370818
water can seep through cracks in rocks and remain there. when water freezes, it expands because the type of bonding changes. in ice, each oxygen atom is surrounded by four hydrogen atoms (two through covalent bonds and two through hydrogen bonding), producing a tetrahedral structure. this gives ice a more open structure compared to water. \n\nso, the water freezes and expands, creating pressure within the rock which causes it to split or break.
1037023
Water, when heated from a solid to liquid state, but ultimately in a gaseous state it again expands.  It still obeys all the laws of chemistry, but the bonds just arrange themselves in a more space efficient manner in liquid than in solid form.\n\nAnd moses with a P, no metals exist with the properties you say.  It is physically impossible, sorry man, but I'm a biochem major and it's my job to know what stuff does under different stresses, and nothing does what you claim.  However, if you do have a material that does this, get in touch with me, we'll talk to the patent office, and we'll license it out to companies for billions of dollars.
858544
Because water expands when it freezes..\nTherefore ice is of larger volume than the water it originated from\ntherefore it is less dense..
131245
It DOESN'T! The ice makes room for itself when the glass fills with water. Melted ice takes up less room that solid. So when it melts, the volume in the glass is the same.
16969
It's a solid, so it's already frozen. Heat it up enough, and it will melt.
196823
The fact that ice always floats on water should give you a clue!  The ice is obviously not as dense.  So you can infer from this something has happened during the freezing process.\n\nThe structure of a water molecule is One atom of hydrogen to two if oxygen.  As the water freezes hydrogen bonds form between the various water molecules and these stop the molecules packing as effectively so the ice is less dense.\n\nTry the source below.
282772
Like all elements, its physical state depends on temperature and pressure. It is a liquid at room temperature, but can be frozen and evaporated at extreems.\n\nIt freezes at -38.83 °C, -37.89 °F\nIt boils at 356.73 °C, 674.11 °F
422975
If flash frozen a bubble can freeze.  A bubble can also exist within a frozen liquid but the bubble its self is then not actually frozen.
1012439
Heat will make molecules expand.  Expanded molecules will take up more room and will affect the volume.  A hot liquid will take up more volume, especially in small containers, like pipettes.  It will give you a false measurement.\n\nFor accurate results, the glassware is calibrated with liquids at the specified temperatures.
210537
mercury expands when heated.  not very much though, that's why it's in such a thin tube-- so the results are exaggerated, more visible, and more easily measured
570058
the outside of the cubes melt the fastest while the inside are still froze.  What happens is the inside refreezes the melting outside therefor sticking together.  This will even happen while in ther freezer (if it is a self-defrosting kind)
811822
The 1st and 3rd answerers above me have correctly identified the mistake in the question itself. Anyway, the answer is found in school science books and it is the density (mass per unit volume) of the ice is less than the density of water of given volume.\n\nTherefore, you would also see that if a glass bottle is filled with water and allowed to get cooled inside the freezer, the bottle will crack when the inside water is turned into ice. This is because the volume of the ice increased and there were not space to accommodate "extra volume" created when ice was formed.\n\nNice learning!
452881
False, because the binding energy increases steeply till iron and again reduces. So I would require enormous accelerators to transmute the element with Z>20.
215770
depends on the ice...\n\nmany different types of ice in different states of being 'frozen' and at different temperatures and with\ndifferent degrees of purity of the water or other frozen substance...\n\nthe answer would be yes more often than no...
1007966
yes, the mass of water/ice does not change during a phase change, only the density and thus the volume. Law of Conservation of Matter.
700946
Interesting question.  I would guess not for long, for the following reason.\n\nThe vapor pressure of liquid water at 32 F or 0 C is 0.08854 psia.  In theory, reducing the pressure above the liquid below this value will cause the water to boil.  However, the escaping steam has a much higher enthalpy than the liquid water.  It draws this heat from the liquid water surrounding the steam bubble as it is formed, thereby cooling the liquid in the process.  Since the liquid is already at the freezing point, the liquid will have to go thru a phase change to ice to supply the heat.  The heat of fusion is much less than the heat of vaporization, so before long you would have a block of ice.\n\nIf you heat the liquid container to match the heat lost in steam, you could keep a boil going, but could not use temperature as a guide since the freeze-up is isothermal.