Complex • The usual coordination number is two‚ four and six (WHY??) • The complex formed can be positive‚ negative charge or neutral. A complex ion [Cu(NH3)4]2+ Centre ion Ligand 5 Coordination complex • E.g. of complexes with a coordination number of four are: Cu(NH3)42+ positive charge‚ ammonia ligand is unidentate. Cu(NH2CH2COO)2 neutral‚ the ligand glycine is bidentate. CuCl42- negative charge‚ ligand chloride is unidentate. 6 Coordination complex • In the analysis
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| National Flag of BRUNEI | | | Economy - overview: | | Brunei has a small well-to-do economy that encompasses a mixture of foreign and domestic entrepreneurship‚ government regulation‚ welfare measures‚ and village tradition. Crude oil and natural gas production account for just over half of GDP and more than 90% of exports. Per capita GDP is among the highest in Asia‚ and substantial income from overseas investment supplements income from domestic production. The government provides
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by Lau and Marsee (2012) examined the correlation between the callous-unemotional personality traits (CU)‚ narcissism‚ psychopathy‚ and Machiavellianism‚ and aggression in young boys. This study found a significant correlation showing a similarity between the three personality traits narcissism‚ psychopathy‚ and Machiavellianism. Results also indicated that there was a correlation between those CU personality traits and different types of aggression (overt and relational)‚ delinquency‚ behavioral
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Iron atoms were oxidized‚ giving two electrons to copper ions which were reduced. 3. What type of reaction was this? Why did it take place? Using the activity series of metals‚ explain why this reaction was possible. (16 pts.) Fe + Cu^+2(aq) ---> Fe^+2(aq) + Cu. This was a single displacement reaction. It took place‚ because the iron atoms gave up two of their electrons to the Cu2+. 4. What was the solid product that formed on the nails? How do you know this? It was rust. When iron comes in
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To identify chemical and physical change in matter. PROCEDURE: Finding out the physical and chemical change in matter. There was seven different substances that were being tested; Mossy Zinc (Zn)‚ Magnesium (Mn)‚ Copper (Cu)‚ Magnesium Oxide (MgO)‚ Copper II Nitrate (Cu(NO3)2)‚ Copper II Carbonate (CuCO3) and Sodium Chloride (NaCl). There were four test tubes set up for the experiment. Each substance was divided amongst the four test tubes. The first test tube was being observed at its natural
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Finding the percentage of copper in brass alloy. Introduction This is an investigation to find out how much copper is in a brass alloy. The brass alloy we are experimenting on is called Muntz Metal. Muntz metal is 60% copper‚ 40% zinc and a hint of copper [http://en.wikipedia.org/wiki/Muntz_metal] (accessed 4/10/12). Muntz metal was developed as an alternative to expensive‚ heavy copper. It is comprised of about 60% copper and about 40% zinc‚ with a small amount of iron. The finished product actually
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Abstract The experiment was conducted‚ which metals manganese (Mn3+)‚ Cobalt (Co3+) and Copper Cu3+ was prepared and acac complexes where also obtained. Recrystallization was performed of which Mn(acac)3 ‚Co(acac)3 and Cu(acac)3 was obtained at percentage yield of 32%‚ 85.6% & 92% for each of acac’s. TLC was performed which results deduced unknown mixture both contained manganese and cobalt since it had the same Rf vaues. Experiment aims The aim of the experiment was to prepare metal
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ARTICLE Received 26 Jul 2013 | Accepted 13 Nov 2013 | Published 20 Dec 2013 DOI: 10.1038/ncomms3920 Development of an ultra-thin film comprised of a graphene membrane and carbon nanotube vein support Xiaoyang Lin1‚2‚ Peng Liu1‚2‚ Yang Wei1‚2‚ Qunqing Li1‚2‚ Jiaping Wang1‚2‚ Yang Wu1‚2‚ Chen Feng1‚2‚ Lina Zhang1‚2‚ Shoushan Fan1‚2 & Kaili Jiang1‚2 Graphene‚ exhibiting superior mechanical‚ thermal‚ optical and electronic properties‚ has attracted great interest. Considering it being one-atom-thick
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responses to TWO questions. ANSWERS MUST BE WRITTEN IN AN EXAMINATION BOOK ANSWERS MUST BE WRITTEN IN INK. EXCEPT WHERE THEY ARE EXPRESSLY REQUIRED‚ PENCILS MAY BE USED ONLY FOR DRAWING‚ SKETCHING OR GRAPHICAL WORK Th ink sw ap Do cu me Part A requires candidate to answer four (4) questions. NO MORE THAN ONE AND A HALF PAGES ON EACH nt Page 1 of3 PART A Write no more than one and half pages on EACH of FOUR of the following questions. 1. What are the environmental
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← Muon ← Is created when a neutrino collides and combines with an H2O proton (weak force) ← Creates blue light ← High energy; travels faster than the speed of light (in water) ← Neutrino ← Type of particle: Lepton (like electrons and muons) ← Most abundant particle in the universe ▪ 1016 neutrinos are passing through your body at any point in time ← Theoretically discovered by Wolfgang Pauli (1930); actually discovered in 1955 ← Produced during nuclear reaction or changes
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