Metals and Halogens reactions Elements such as fluorine‚ chlorine‚ bromine‚ iodine‚ and astatine belong to Group 7‚ Halogens. At room temperature‚ fluorine is a yellow gas‚ chlorine is a pale green gas‚ bromine is a red liquid‚ and iodine is a purple solid. Astatine is a radioactive element‚ therefore it exists only in small amounts. All the halogens exist in diatomic molecules. They have high ionization energies and are the most electronegative elements. Their electron configuration ns2 np5 make
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Copper to Silver to Gold—A Comparison of Physical and Chemical Changes (Adapted from Abra-Ka-Dabra by C. M. Bires.) Introduction Hundreds of years ago‚ noblemen and women would pay large sums of money to alchemists. These early chemists were similar to modern-day illusionists in that they used a little science‚ a few tricks‚ and some acting to convince their clients that they had the ability to transform base metals into pure gold. Although these alchemists were eventually revealed as charlatans
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CITRUS AURANTIUM PEELS IN POWDER FORM AND THE POSITIVE CONTROL FOOT POWDER AT THREE DIFFERENT MIXTURES AS FOOT ODOR AND SWEAT MINIMIZER” A Thesis Presented to the Faculty of Virgen Milagrosa Special Science High School In Partial Fulfillment of the Requirements In Science Research II By: Kathleen Mae S. Cancino November 2009 APPROVAL SHEET This thesis proposal entitled “Comparative Effects of Citrus aurantium Peels in powder form and the positive
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Constant Density: Displacement of Zinc and Tin Introduction: Density is the concentration of molecules within an object on relation to its size. The formula for measuring density is mass/volume. In the experiment preformed for this lab report‚ calculating the density of a regular object (a wooden block) and two other irregular objects (zinc and tin) were found by a process known as water displacement. The purpose of this experiment was to prove that the density of an object remains the same
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Copper vs. Fiber Modern telecommunication networks rely primarily on two types of cable. Older copper cables have been replaced in many cases by fiber optic "light pipes‚" first in undersea cables and major intercity trunks‚ and later directly to many homes and businesses. Principles Copper cables carry information as an electrical signal‚ which may be digital‚ as in phone lines‚ or analogue‚ as in audio speaker cable. In optical fibers‚ however‚ data is carried digitally by light from a laser
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Products details Type:Other Condition:New Year:2014 Capacity(t/h): Specifications Spodumene ultrafine powder mill is specializing in producing fine and superfine powder of non-explosive‚ non-inflammable and brittle materials with Moh’s hardness under six‚ the moisture under 5% such as calcite‚ chalk‚ limestone‚ dolomite‚ kaolim‚ bentonite‚ talc‚ mica‚ magnesite‚ purophyllite and vermiculite‚ sepiolite‚ attapulgite‚ rectorite‚ diatomite‚ barite‚ gypsum‚ alunite‚ graphite‚ fluorite‚ rock phosphate
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Protein powder is bad because it contained a lot of additive‚ sugar and too much protein. Although natural protein provide immune system defense for the body and also contain antioxidant components‚ however‚ that does not mean that protein shake or protein powder has the same function as the natural protein. As time goes by‚ protein powder has become essential for muscle builder to consume. People drink protein shakes or take pills while they are working out or after performing intense exercise.
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Moles of Iron and Copper Lab Data and Observations Before the reaction: Mass of empty‚ dry beaker: 153.44g Mass of beaker + copper (II) chloride: 161.44g Mass of two iron nails: 7.27g After the reaction: Mass of two iron nails: 6.29g Mass of beaker + copper (dry): 154.50g Questions and Calculations 1. a) Mass of two iron nails before the reaction – Mass off two iron nails after the reaction = Mass of iron used in the reaction = 7.27g – 6.29g = 0.98g
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Between 1776 and 1870 there were many pivotal changes in the history of the United States. Some of those changes between that time period were for example the change in population due to the fact that many people were immigrating to the United States due to slave trade. Another change in this time period was all the new innovations created for example roads and many other new inventions. Also another change was the writing of the Declaration of Independence which gave freedom from the British. First
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Writing Practical Reports Aim: To observe what happens during and after a chemical reaction. Equipment: Concentrated nitric acid in a glass dropping bottle Small pieces of Copper 250ml Beaker 2 M Lead nitrate in a dropping bottle 2 M Potassium iodide in a dropping bottle 2 M Copper sulfate in a dropping bottle 2 M Sodium hydroxide in a dropping bottle 2 M Hydrochloric acid in a dropping bottle 4 Pyrex test tubes Test tube rack Spatula Bunsen burner‚ gauze
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