which of the following has a melting point greater than room temperature?a.oxygenc.ironb.waterd.bromine
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Which of the following has a melting point greater than room temperature? a. oxygen c. iron b. water d. bromine So, iron has a melting point greater than room temperature due to the fact that metals are made up of giant structures of atoms in a regular arrangement, and there are strong forces of electrostatic attraction between positive metal ions and negative electrons, meaning that a lot of heat energy is required to break the bonds, i.e. a very high ...
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ATOMIC AND PHYSICAL PROPERTIES OF THE GROUP 7 ELEMENTS (THE HALOGENS) If you explore the graphs, you will find that fluorine and chlorine are gases at room temperature, bromine is a liquid and iodine a solid. Nothing very surprising there! Explaining the trends in melting point and boiling point All of the halogens exist as diatomic molecules-F2, Cl2, and so on. The intermolecular attractions between one molecule and its neighbours are van der Waals dispersion forces. Notice that the trend down the Group isn't tidy.
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What Is the Melting Point of Iron? Iron has a melting point of 1535.0 degrees Celsius or 2795.0 degrees Fahrenheit. It has a boiling point of 2750.0 degrees Celsius or 4982.0 degrees Fahrenheit. Continue Reading.
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Iron At room temperature, iron is in the form of ferrite, or α-iron, a body-centered cubic structure. The density of α-iron is 7.86 g/cc. At 910°C it changes to γ-iron, which is face-centered cubic and somewhat softer. At 1535°C iron melts, and boils at 3000°C.
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States of halogens at room temperatures? Best Answer: Let us start by establishing the actual physical state of each halogen at room temperature let us say 25°C. F2 = gas. Cl2 = gas. Br2 = liquid. I2 = solid. All of the halogens exist as diatomic molecules - F2, Cl2, and so on.
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What two elements are liquid at room temp? Best Answer: Mercury and Bromine are the first two that come to mind, but Francium, Cesium, Gallium and Rubidium become liquid just above room temperature. - Stuart.
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Exam #1 Practice Questions True or False: Liquid oxygen should have a larger surface tension than liquid bromine (assuming T and P are the same for both liquids). False: Surface tension of liquids increase as Intermolecular Force strength increases. Both O2 and Br2 are non-polar molecules, and have only dispersion forces. Those dispersion forces are stronger for Br2, however, since it has many more electrons (70 vs. 16) than does O2.
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What are diatomic gases? 2. Because some of the diatomic elements are gases that all gaseous elements (or even molecules) must be diatomic. Only five of the diatomic molecules are gases at room temperature. Bromine is liquid and iodine is a solid at room temperature. All noble gases are monoatomic.
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Why does the melting &boiling point of elements decreases when we move down a group in the periodic table? but Iodine is solid at room temp. In group 7 the boiling point increase down the group. In group 1 and 2 the melting and boiling point decrease down the group. IN group 1 and 2 the metal become more reactive down the group and are more readily to give up their electrons to non-metals. It is seen that more reactive metal have lower melting and boiling points. Opposite of Halogens.
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- 1 Most nonmetals are gases at room temperature; however, a few are solids and only one (bromine) is a liquid. 2  The noble gases are an unreactive group of nonmetals that like to exist as independent atoms, or be monatomic.
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- Some elements on the periodic table are oxygen, helium, arsenic and fluorine. Oxygen is an odorless, tasteless and colorless gas at room temperature, but is bright blue as a liquid. Oxygen is a very reactive element and is paramagnetic, which means it has unpaired electrons. Full Answer >.
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- The temperature at which a solid becomes a liquid. For a given substance, the melting point of its solid form is the same as the freezing point of its liquid form. The melting point of ice is 32°F (0°C); that of iron is 2,797°F (1,535°C). Noun.
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- At room temperature hydrogen is a gas. It is a colorless, tasteless and odorless gas. It is the lightest gas. It is insoluble in water. It is highly inflammable and burns with blue flame forming water. Liquefication temperature of hydrogen is -252oC. Bond energy of H-H is 431 Kj/mole. Electro negativity of hydrogen is 2.1.
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Hydrogen peroxide Hydrogen peroxide and water form a eutectic mixture, exhibiting freezing-point depression; pure water has a melting point of 0 °C and pure hydrogen peroxide of −0.43 °C, but a 50% (by volume) solution of the two freezes at -51 °C.
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Chemical elements listed by melting point For chemistry students and teachers: The tabular chart on the right is arranged by melting point. The chemical element with the lowest melting point is Helium and the element with the highest melting point is Carbon. The unity used for the melting point is Celsius (C). Click here: to convert Celsius to Fahrenheit or Kelvin.
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Earth's Core 1,000 Degrees Hotter Than Expected Scientists sent X-ray bursts at the sample and observed the signature of heating, which is a diffuse ring, that pinpointed the temperature. These experiments pegged the melting point of iron at 4,800 C (about 8,700 F) at a pressure of 2.2 million times that is found on Earth's surface at sea level.
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- 1535C (2795F) - melting point of iron. ~1510C (2750F) - melting point of typical structural steel. ~825C (1517F) - maximum temperature of hydrocarbon fires burning in the atmosphere without pressurization or pre-heating (premixed fuel and air - blue flame)
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- Physical States — Melting Points, Boiling Points, and Densities. In the periodic table above, black squares indicate elements which are solids at room temperature (about 22C)*, those in blue squares are liquids at room temperature, and those in red squares are gases at room temperature.
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CHM Ch.1-4 B) ten grams of water occupies a larger volume than 10.0 g of aluminum. C) water has a greater potential energy than aluminum. D) water has a larger specific heat than aluminum. E) 10.0°C is closer to the melting point of water than to the melting point of aluminum.
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- The chalcogens, the oxygen group, is located in column 16 of the periodic table. It contains the elements oxygen, sulfur, selenium, tellurium, polonium, and ununhexium (O, S, Se, Te, Po, and Uuh, respectively). These elements all contain six valence electrons and form 2- ions.
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- The elements hydrogen, helium, nitrogen, oxygen fluorine, neon, chlorine, argon, xenon, krypton, and radon are gasses at room temperature.
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The Halogens They lack only one electron to form a complete shell or subshell, and are extremely active chemically. Chemical activity increases as you move upward in the group, fluorine being the most active element in the Periodic Table. At room temperature, fluorine and chlorine are gases, bromine is liquid, and iodine is solid.They form diatomic molecules in the pure state. The halogens are poisonous, and chlorine gas and chlorine compounds have been used as chemical weapons.hey lack only one electron to form a complete shell or subshell, and are extremely active chemically. Chemical activity increases as you move upward in the group, fluorine being the most active element in the Periodic Table. At room temperature, fluorine and chlorine are gases, bromine is liquid, and iodine is solid.
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What are the elements that are solid at room temperature? All elements above uranium are solid at room temperature. two elements are liquid at room temperature that is Bromine and mercury.
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Chem* Heavy Quiz 1. Like most substances, bromine exists in one of the three typical phases. Br2 has a normal melting point of −7.2°C and a normal boiling point of 59°C. The triple point for Br2 is −7.3°C and 40 torr, and the critical point is 320°C and 100 atm. Using this information, sketch a phase diagram for bromine indicating the points described above. (Do this on paper.
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Valve Cover Gasket Replacement Service & Cost On the top, your engine is sealed by the valve cover. This valve cover has a gasket (which is made out of rubber or cork), which seals the cover to the engine, and keeps any oil from leaking out. If the gasket deteriorates, oil will begin to leak out.
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- Oxygen is a non-flammable gas that is colorless and odorless. It has a melting point of 54.36 Kelvin and a boiling point of 90.19 Kelvin. Oxygen speeds the rate of combustion by acting as an oxidizing agent.