Firstly, unknown B has a low melting point, a prominent characteristic among covalent compounds. This is due to the attraction between the atoms not being as reinforced as an ionic compound, thus it takes less energy to separate. In addition, unknown B has a very low solubility and conductivity, this is due to the atoms sharing electrons, therefore they cannot have the ability to separate and form an ion. However, it should be noted that covalent compounds should most definitely not be conductive or soluble, but the results have shown otherwise, thus it should be concluded that there may have been contamination between the scoopula’s used. Conclusion All in all, the experiment has provided much insight into the topic of ionic and covalent bonds regarding compounds.
These cold temperatures cause chemicals in living cells to react too slowly to support the actions necessary for life. In conclusion, my group believes that life on Miranda is impossible. All of the characteristics of this moon work against what is needed to successfully house life. Miranda has no water, very few nutrients and unreasonable temperatures for anything to live. Overall, Miranda cannot supply the necessities needed to make it habitable resulting in Miranda being an unstable moon for anyone or anything to survive and
The vapor itself is colourless and odorless. Inorganic mercury consists of salt compounds with elements such as chlorine, sulfur, and oxygen. The salt is usually white in appearance and takes the form of powder or crystals. However, mercuric sulfide is red and turns black upon exposure to light. If mercury combines with carbon, it creates organic mercury.
Nobody is quite sure exactly what it is, except that it’s a fundamental property of matter, existing in 2 opposite polarities called positive and negative. Protons, 1 of 2 particles in atomic nuclei, are positive, while neutrons have no charge. Orbiting around the nucleus are electrons, the same number as protons inside the nucleus. Although electrons have 1,836 times less mass than protons, an electron has an equal (but opposite) charge (positive). Because they’re light and positioned outside the nucleus, electrons are much more easily dislodged from atoms than protons, so they’re the crucial carriers of electric charge.
The literature melting point range of methyl trans-cinnamate is ~34-38oC (Aldrich).4 The obtained melting point of the crude was 34.5-35.5oC, which is a highly narrow range of less than 1oC difference and it also falls within the expected melting point range. Hence, the crystal lattice structure of the product is largely intact, requiring an even amount of thermal energy to melt the sample. The experimental melting point range indicates the crude product is relatively pure with minimal impurities. The percent yield was satisfactory, having a 68% yield. To optimize this yield, consider the steps in how the reagents are introduced to the reaction mixture in terms.
Local pollution description General physical and chemical properties of Phosphorus What is the definition of Phosphorus? It is a highly reactive, poisonous, non-metallic element occurring naturally in phosphates, especially apatite. It exists in three allotropic forms, white, red and black. Physical Properties White phosphorous is white, waxy solid, giving off a greenish-white glow in the dark. It is spontaneously flammable when exposed to air and is deadly poison.
Chemical Properties: Reaction with air: - When plutonium is exposed to air it begins to oxidise, it forms a yellowish-brown outer coat and begins to tarnish. Soluble in: - Hydrochloric acid Insoluble in: - Nitric acid - Concentrated hydrogen sulfide The Critical Mass: - Around 300 grams which is only about a third of that of Uranium 235 Allotopic Structures: - Plutonium exhibits six forms of crystalline structures. The only form that exists at room temperature is the alpha structure. It has the highest electrical resistivity of any metallic
The element in its natural form is a shiny, ductile, malleable, soft and silver element. The element is slow to react with water however it dissolves rapidly in acids. Gadolinium is found in an oxidized form in nature. Gadolinium is mainly found in monazite and bastnasite. The biggest gadolinium reserves are in Cina, USA, Brazil, Sri Lanka, India, and Australia.
Specimens with a dull luster are usually massive, contain abundant impurities and do not have the brilliant red color of pure cinnabar. When cinnabar is inappropriately overheated, mercury vapor can also be released, and therefore, heating cinnabar is never a part of preparation technique. Thus, cinnabar is the only form of mercury used in traditional medicines . Properties of Cinnabar Chemical Classification - Sulfide Color - Bright red to brownish red, sometimes gray Luster - Adamantine to dull Diaphaneity - Transparent, translucent, or
Description: White to creamy-white, finely divided, free- flowing, practically tasteless, odorless or nearly odorless, hygroscopic powder. Solubility: Practically insoluble in water and most organic solvents. Stability: Crospovidone is stable. Storage conditions: Since it is hygroscopic it should be stored in an airtight container in a cool, dry, place. Incompatibilities: When exposed to a high water level it may form molecular
Ethylene dichloride is a chlorinated organic compound consisting of two singly bonded carbon atoms bonded to one chlorine atom on each carbon and is assigned the CAS registry number 107-06-2scifinder. Ethylene dichloride should not be confused with 1,2-dichloroethylene which contains a double bond between the two carbons. Although a stable compound at room temperature, it does slowly decompose in the presence of oxygen and UV light turning a darker colour, and at temperatures above 340 oC it begins to decomposes forming vinyl chloride & HCL Ullmann’s & http://www.cdc.gov/niosh/npg/npgd0271.html . Table 1 lists the basic physical and chemical properties on ethylene dichloride. Table 1: Physical and Chemical Constantshttps://pubchem.ncbi.nlm.nih.gov/compound/11#section=Top Molecular Weight
The “cloud” of electrons surrounding the nucleus give off a negative charge. Electrons are a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids. Inside the dense nucleus, are protons and neutrons (Doc. 2). Protons are a stable subatomic particle with a positive charge that is the opposite of an electron and occurs in all atomic nuclei.