Spectroscopy Introduction The purpose of the atomic spectroscopy lab experiment was to investigate the relationship between visible light‚ which is the visibly observable range of electromagnetic radiation and the change in energy levels of an element. The line spectrum that was seen in the spectroscope was the evidence of excited atoms emitting electrons and radiating a spectrum of light as it moved from a higher energy state back down to a lower energy level. Using a spectrometer with diffraction
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should have a basic understanding of the following: * HTML / XHTML If you want to study these subjects first‚ find the tutorials on our Home page. What is CSS? * CSS stands for Cascading Style Sheets * Styles define how to display HTML elements * Styles were added to HTML 4.0 to solve a problem * External Style Sheets can save a lot of work * External Style Sheets are stored in CSS files CSS Demo An HTML document can be displayed with different styles: See how it works
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ionGeometric Progression‚ Series & Sums Introduction A geometric sequence is a sequence such that any element after the first is obtained by multiplying the preceding element by a constant called the common ratio which is denoted by r. The common ratio (r) is obtained by dividing any term by the preceding term‚ i.e.‚ where | r | common ratio | | a1 | first term | | a2 | second term | | a3 | third term | | an-1 | the term before the n th term | | an | the n th term |
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odourless‚ tasteless‚ soft‚ light yellow solid. It is insoluble in water‚ but is soluble in carbon disulfide. Sulfur is very reactive; it reacts with all metals except gold and platnium‚ forming sulfides. It also forms compounds with various non-metallic elements. Sulfur forms over 30 solid allotropes. Sulfur is a chalogen (group 16 of the periodic table) and a non metal. Sulfur’s atomic weight is 32.06. It has 16 electrons‚ protons and it’s neutrons in it’s isotope is 16. It has a melting point of 115.2*C
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carbonate of lime. The roman wall paintings were inspired by Greek and Hellenistic paintings and architecture.� The wall paintings were classified into four ’styles ’ by German archaeologist August Mau (1840-1909). He did not consider individual elements of paintings but rather focused on decorative composition and patterns and how they might be grouped into certain period ’styles ’. So these styles marked the shifting point in the chronology of painting from 2nd century BC to the final eruption
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research on atoms. He proposed a table of atomic weights for the number of the known element. This image is Dalton’s table of elements and the number of elemental combinations described in his 1808 publication ‘New System of Chemical Philosophy’. It also shows the molecular of formula of known gases. His theory is all matter is made of atoms and unchangeable and indestructible. Also all atoms are given an element are identical in mass and properties. The theory continued; he believed that a chemical
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“The Synthesis of Zinc Chloride”‚ what a peculiar name for a lab that does not even involve synthesis. Synthesis‚ by definition‚ is when two elements are combined in a chemical reaction‚but that is not the case. In this lab we are combining zinc‚ an element‚ and hydrochloric acid‚ a compound‚ but combining a compound and an element is not synthesis‚ it is single replacement. We are taking zinc and hydrochloric acid and making zinc chloride and hydrogen‚ a single replacement‚ but what occurred during
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of and will talk about it soon. I was discovered in 1669 by my closest human friend‚ Henning Brand. He is such a wonderful human and I love him a lot. He discovered me by extracting me from buckets of urine. In the history of all elements‚
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of the elements on the periodic table. The Disappearing Spoon focuses on the history of the periodic table by recounting stories about each element on the table‚ and the scientist that discovered it. For each element‚ Kean provides an extensive backstory about its origin‚ the common (or uncommon) uses of the element‚ and other interesting tidbits. The author begins the novel with a general physical description of the periodic table as a whole; he discusses the names of the groups of elements and their
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Fluorine Moissan discovered fluorine in 1886. It is a chemical element with the symbol F‚ atomic number 9‚ 9 electrons and protons‚ 10 neutrons‚ and the atomic mass of 19. Being the lightest halogen‚ it has one stable isotope‚ fluorine 19. At standard pressure and temperature‚ the element is a pale yellow gas as a liquid its a bright yellow. The electrons are located outside the nucleus of the atom. Electrons are organized in such a way that the space between them are inter dispersed. Within this
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