Bismuth Melting Point

Due to these factors, this graduate student supplies a rating of ‘3’ concerning this element.

The first part of the experiment focused on finding the melting point range of known substances, Trans-cinnamic acid and Urea. The Trans-cinnamic acid had a melting point range of 133.0-135.8℃. Urea had a melting point range of 132.5-135.8℃. However, when a 50/50 mixture was created of the two substances, the melting point range was 98.8-132℃, 40 degrees less than the two known substances. This is due to an impurity of the 50/50 mixture. Each substance was acting as an impurity to the other substance. The expected range for Trans-cinnamic acid was 132-135℃ and Urea had an expected range of 132-133℃. Trans-cinnamic acid and Urea are similar compounds but lack identical structure, causing their combined melting point range to be lower than what

Mineral |Crystal shape |Color |Density |Hardness |Streak |Fizzes in acid? | |Galena (lead ore) |Cubic/ irregular |Gray |7.5 g/mL |3 |Dark gray |No | |Gold |Irregular |Golden yellow |19.3 g/mL |3 |Yellow |No | |Graphite (pencil lead) |Irregular |Dark gray |2.2 g/mL |2 |Gray |No | |Hematite (iron ore) |Irregular |Red-brown to black |5.3

Its freezing point is -38.83 degrees Celsius and its boiling point is 356.73 degrees Celsius. It has a white/silvery appearance, almost like a mirror. It has a high surface tension but is a bad conductor of heat. Mercury has 34 isotopes and 7 stable isotopes.

It was identified as a new element in 1781. Its ores contain wolframite and scheelite. The element is remarkable for its robustness. It has the highest melting point of all the elements. Also its high density of 19.3 times that of gold or even water. Polycrystalline tungsten is an intrinsically hard and brittle material because of its weak grain boundaries, making it difficult to work with. However, pure single-crystalline tungsten can be cut with a hard-steel

Bismuth, the eighty third element on the periodic table, is a gray, negligibly radioactive metal that is slightly less dense than silver. You’ve probably seen it, sitting idly inside small bins in museum gift shops, or hanging on earrings, necklaces, or bracelets, or even in a brand of over the counter gastrointestinal aids. In most of these contexts, it takes the form of intricate geometric crystals, in “stairstep” patterns of inlaid

The element I got was Lead, Lead is a chemical element that is assigned the symbol Pb it is from the Latin plumbum and it is a bluish-white element, Lead is not really rare but since it is fairly widespread and easy to extract it typically occurs in very small amounts in ores and is found in the ores galena, anglesite, cerussite and minim also the earth’s crust contains approximately 0.0013 percent lead. Lead can be toxic to humans and animal but is found mostly in combination and used a lot in cable sheaths, batteries, solder, and pipes, its ductility and resistance to corrosion with tiny leaks, make it a particularly good material for constructing water pipes. This element has been known since ancient years and the year is unknown when it

The tables above display the melting point range of each of the chemicals tested. Table 1 represents the results found in part 1 of the lab. It was found that the 50-50 mix has the lowest melting point. This is likely because the less pure a compound is, the lower its melting point will be. The 50-50 mix is the least pure of the 3 compounds so therefore the melting point was lower. In Part two of the lab it was found that the melting point range of the unknown compound (shown in table 2) is closest to the melting point of trans-cinnamic acid. To confirm this, the melting point of the unknown compound was tested next to trans-cinnamic acid and a 50-50 mix of trans-cinnamic acid and the unknown compound. As seen in table 3, while the start point of each of the compounds varied, all three of the compounds had an extremely similar end point.

The physical characteristics are what helps make element 35 unique. It has 35 protons, 35 electrons, and 45 neutrons. Bromine’s boiling point is 138 °F [59 °C], and its freezing point is 19 °F [-7.2 °C]. Its atomic mass is 79.90 grams per mole. “It is the only nonmetallic element that is liquid at room temperature.” (Appelman, 2006) It has a reddish brown color and is not safe to touch or consume in any way. The foul smelling vapor from the element

Only barely enough Americium has been produced to know a few of its properties. Some of the physical properties that it has are basic properties. It is a shiny silvery-white color and is very radioactive. Americium has few chemical properties. For example, at room temperature Americium is a solid, but it tarnishes slowly in dry air. Its melting point is

Rubidium is a very intriguing element with many different properties. Rubidium has a melting point of 38.89º

Osmium is a grey-white metal (Image 1), which is also very hard and brittle, and of the platinum metals, it has the highest melting point therefore making it difficult at both fusing and casting. Atomic number 76 Atomic weight 190.2 Melting point 3033°C, 3,306°K (5,432°F) Boiling point 5,012°C, 5,285°K (9,032°F) Specific gravity 22.48 per cubic centimeter (20°C) Oxidation states +2, +3, +4, +6, +8 Table 1. Osmium (Os) atomic number and weight. Also its determined melting and boiling point. Osmium has the highest boiling point of any platinum metal.

I was instructed to record a melting point range for each compound, rather than a single temperature melting point. The reason for this instruction is that polymers and unpure substance melt over a range of several degrees. Based on the melting point ranges for both substances, it is difficult to differentiate the two based on its melting point data alone. The ranges of the substances are close enough to one another that one could argue for experimental error when presenting the data as a solo identifying property.

Its atomic number is 19 and it has an atomic mass of 39.1. All Alkali Metals share similar properties such as being silvery-white in color, shiny, although it oxidizes fairly quickly, and extremely reactive (the most reactive of all metals) with other elements such as water and oxygen, which is why pure potassium is never found in nature standing alone and the

Recrystallization was done to remove impurities from the sample. The percent recovery of benzoic acid during recrystallization is 23.02%. The difference between the pure and impure samples was observed by comparison of melting points. It was found that impure sample had a lower and wider melting point range of 120.1-122.2 (C). The pure sample melting point range was 121.3-122.5 (C). These ranges helped determine purity by comparing the known melting point of pure benzoic acid.