Report: Period 3 Elements Name: Titus Lee Date: 12th February 2014 Partners: Louella Jarillas‚ Vevaan Nguyen‚ Alexandro Francisco‚ Alif Ahmed Aim: To examine the similarities and differences between the properties of a selection of the elements of Period 3 Hypothesis: Sodium will be the most reactive element and sulphur will be the least reactive Equipment and Method: Found on Page 28-9 in Heinemann Chemistry 1 Student Workbook Results: Element Observations Element Observations Metal
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5. The number of protons in one atom of an element determines the atom’s _____________‚ and the number of electrons determines the ________________ of the element. 6. The atomic number tells you the number of ____________ in one atom of an element. It also tells you the number of ____________ in a neutral atom of that element. The atomic number gives the “identity” of an element as well as its location on the periodic table. 7. No two different elements will have the ____________________. What is
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Phosphorus is the best Element that you can buy in the market anywhere in the world for the use of fire to things like pesticide. Phosphorus was discovered in 1669 by a man named Hennig Brand in Hamburg‚Germany when he was preparing it from buckets of urine because urine contains high quantities or dissolved phosphorus. The Element was named Phosphorus because it comes from a Greek word called phôs (light) and phoros (bearer) which means “bringer of of light”. Phosphorus which has the Element symbol of P is
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is a visual representation of the periodic law which states that certain properties of elements repeat periodically when arranged by atomic number. The table arranges elements into vertical columns (groups) and horizontal rows (periods) to display these commonalities. ------------------------------------------------- Elemental ideas from ancient times People have known about some chemical elements like gold‚ silver and copper from antiquity‚ as these can all be discovered in nature in
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New Elements Describe why "new" elements (man-elements) are created‚ or why do we benefit in creating them? Elements are the building blocks of which all things are composed. The elements of Earth are made up of atoms. All atoms possess a nucleus of positively charged protons as wells and neutrons which are neutrally charged. Surrounding the nucleus is a low density area containing negatively charged electrons that are equal to the number of protons within the nucleus. The number of protons within
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Contributors of the Periodic Table of Elements The First International Congress of Chemists took place in September 1860 in Karlsruhe‚ Germany to review scientific matters that there was little agreement to. Following this congress led to the development of the periodic table of elements. Top contributors to the periodic table included Staislao Cannizzaro‚ Dmitri Mendeleev‚ Henry Gwyn-Jeffreys Moseley‚ John William Strutt‚ William Ramsay‚ Friedrich Ernst Dorn‚ and Glenn Seaborg. Stanislao Cannizzaro
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Anderson Kuo Period 1 CHAPTER 19 – The Representative Elements: Groups 1A through 4A -19.1- A Survey of the Representative Elements I. Elements A. Representative Elements: Groups 1A through 8A ← Filling s and p orbitals ← First member of a group forms the strongest ( bonds; results in diatomic molecules B. Transition Elements: center of the table ← Filling d orbitals C. Lanthanides & Actinides: listed separately‚ on the bottom on the table ← Filling
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Ruthenium often called its symbol‚ Ru‚ which atomic number is 44 and the atomic mass is 101.07 u ± 0.02 u. This element is known to have 27 radioactive isotopes but 7 regular isotopes. Ruthenium is solid at room temperature and looks like a hard‚ silvery-white metal with a shiny surface ( See page 2 for picture. ).The 3 main types of subatomic particles are protons‚ neutrons‚ and electrons. To humans Ruthenium is highly toxic and carcinogenic‚ and shouldn’t be touched if came into contact with.
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The Element Niobium Atomic Number: 41 Atomic Weight: 92.90638 Melting Point: 2750 K (2477°C or 4491°F) Boiling Point: 5017 K (4744°C or 8571°F) Density: 8.57 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 5 Group Number: 5 Group Name: none What’s in a name? Named for the Greek mythological figure Niobe. Say what? Niobium is pronounced as ni-OH-bee-um. History
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Most elements have isotopes. For stable isotopes‚ an interesting plot arises when the number of neutrons is plotted versus the number of protons. Because the plot shows only the stable isotopes‚ this graph is often called the Nuclear Belt of Stability. The plot indicates that lighter nuclides (isotopes) are most stable when the neutron/proton ratio is 1/1. This is the case with any nucleus that has up to 20 protons. As the atomic number increases beyond 20‚ a different trend becomes apparent. In
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