Platinum It's chemical properties. What is it used for? Platinum Symbol: Pt Atomic number: 78 Atomic mass: 195,084 Group 10 - transition metal It was discovered by Julius Scaliger in 1735. Structure Number of electrons: 78 Number of protons: 78 Number of neutrons: 117 Electronic configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d9 6s1 Physical Properties 1) It is a solid metal (at room temperature) 2) Color: steel-gray to dark gray, shiny 3) malleable 4) ductile 5) Melting point: 3214 °F=1768 °C 6) Boiling point : 6917 °F=3825 °C 7) Insoluble in water 8) Good electrical and thermal conductor Chemical Properties 1) Ions: Pt+2, Pt+4, Pt+1, Pt+3 2) non-corrosive metal - can only be corroded by halogens, cyanides or sulfur. 3) non-toxic 4) resistant to tarnishing 5) Synthesis reaction Pt+3F2=PtF6 6) Single replacement reaction Pt+NaCl=PtCl+Na 7) Decomposition reaction PtI=Pt+I2 8) Reaction with air - none 9) Reaction with 3 M HNO3 - none 10) Reaction with 6 M HCl - none 11) Reaction with 6 M NaOH - none ...
The data in table 3.6 follows these trends; therefore, the EPS board was functioning as
The animals in Yellow Wallpaper, Chrysanthemums, and Boys and Girls represents the characters and their characteristics. In Yellow Wallpaper John’s wife has postpartum depression. John is her physician but he doesn’t let her go out or do anything. She sits in a room that she hates and eventually escapes. Chrysanthemums is about a girl named Elisa and she loves to grow chrysanthemums. She meets this guy who is on the road all the time and he lives off of fixing broken pots and pans. Boys and Girls is about a family whose father takes the foxes fur and sells it for calendars. They get two horses named Mack and Flora who are going to potentially be used as horse meat. They don’t kill them instantly because at the time they had too much meat so they used them on the fields although Mack is lazy. They eventually kill both
The short story "The Chrysanthemums" gives insight into the life of its author. John Steinbeck was born on February 27, 1902, in Salinas, California. The locale of the story is of key resemblance to the Salinas in which Steinbeck was born and bread. "Salinas was a typical American small town, [differing] only in location and a few distinctive features" (McCarthy 3). The protagonist of this story, Elisa Allen, also resembles Steinbeck's first wife. "Steinbeck probably based the character of Elisa Allen on his own first wife, Carol Henning Steinbeck. Like Elisa, Carol was a woman of considerable talent and energy who wore 'masculine clothes' and was 'strong, large-boned' and 'handsome rather than pretty'" (Hughes 23). Similar to the time frame in which Steinbeck lived, the theme of the story comes across as being male dominant and the rustic setting allows us to visualize this.
Many elements, like lead, are very important to the structure and formation of many of the products we use. Throughout history, lead has been developed, mined, extracted, and used. Lead, since its finding thousands of years ago, has proven to be a tricky element with many diverse health effects. Scientists have developed products, and processes that still continue to used lead. Lead is an extremely important and influential element in our daily lives.
I also labeled with numbers so that we can apply this method in any key.
are contained in the apparatus subsection, but a basic schematic is shown in Figure 1.1
I am going to discuss about the element known as gold in my assignment. To describe the element gold in simple terms, I can only say that it is an element (chemical element). This element is denoted by the symbol Au. It has an atomic number of seventy nine (79). I will describe quite a number of things concerning gold as an element. To begin with is:
Pu Songling was a Qing Dynasty Chinese writer in the early eighteenth century who is renowned for being the author of Strange Tales from a Chinese Studio. This publication contains about five hundred zhiguai and chuanqi genre short tales delivering implicit messages and lessons that serve to criticize societal and moral issues. In contrast to Pu Songling, whose tales were focused on the everyday lives of commoners and thus aimed towards commoners, Ueda Akinari’s tales from Tales of Moonlight and Rain, inspired by his faith and belief in the supernatural from his childhood, are catered to a smaller, more educated, and more literate audience. Pu’s story, “Friendship Beyond the Grave,” and Ueda’s “The Chrysanthemum Vow” have quite little alike in terms of plot, and the darker mood of “The Chrysanthemum Vow” very clearly contrasts the lighter, happier mood present through most of “Friendship Beyond the Grave.” Upon closer reading, however, there is a link between the stories, in that the theme of undying friendship and loyalty is incorporated , albeit in different ways, in both narratives.
I was successful in my attempts to use floo powder to travel into your office, however as I forgot to close my eyes, it was quite a dizzying experience! Despite that, it was an enjoyable experience when I traveled through the fires with my whole body. Head-only floo powder transport was not as enjoyable. It made me feel sick having my head in a different place than my legs. Also, my knees hurt from kneeling on the hard stone floor beside the fire for that amount of time.
Coal mining, for example, is hard work, but it is necessary—we must have coal. Working in the sewers is unpleasant, but somebody must work in the sewers. And similarly with a plongeur ’s work. Some people must feed in restaurants, and so other people must swab dishes for eighty hours a week. It is the work of civilization, therefore unquestionable. This point is worth considering. Is a plongeur ’s work really necessary to civilization? We have a feeling that it must be ‘honest’ work, because it is hard and disagreeable, and we have made a sort of fetish of manual work. We see a man cutting down a tree, and we make sure that he is filling a social need, just because he uses his muscles; it does not occur to us that he may only be cutting down
23. S. Alwarappan, S. Boyapalle, A. Kumar, C.-Z. Li and S. Mohapatra, J. Phys. Chem. C, 2012, 116, 6556–6559
Basic Mathematics for Electronics seventh edition: Nelson M. Cooke, Herbert F.R Adams, Peter B. Dell, T. Adair Moore; Copyright 1960
Figure 2.7 shows the properties of magnesium based on physical, mechanical and chemical properties. Magnesium element is strong, ductile and light- weight metal. It is malleable when heated and react slowly in cold water. The chemical properties are it is highly flammable metal and high chemical reactivity (Boccaccini & Gough, 2007).
Thellësia e depozitave të Bulqizës Veriut, depozita në Qafë Buall, zona Batër-Lugu i Gjatë-Fushë Lopë, zona Liqeni Sopevë-Thekën-Tërnov dhe thellësia e depozitës Thekën;