• Bohr And The Periodic Table
    473 words
    Bohr's Model There are three main parts of an atom the electrons, protons and the neutrons. Each part has charge. It is rather positive, negative, or neutral. An electron always has a negative charge. Protons always have negative charges. Then finally the neutron is a neutral charge or a charge of zero. If the charge of the whole atom it zero that means there are an equal number of positive and negative pieces. An electron can be found anywhere around the nucleus, and the protons and neutrons a...
  • Periodic Table Atomic Weights
    1,082 words
    The History of the Periodic Table of Elements Dmitri Mendeleev and the early Periodic Table Dmitri Mendeleev was born in Tobolsk, Siberia; on February 7, 1834. He was the youngest of 14 children born to Maria Dmitrievna Korniliev and Ivan Pavlovich Mendeleev. His father was director of the local gymnasium. Maria Korniliev's family settled in Tobolsk in the early 1700's and introduced paper- and glass-making to Siberia. Unfortunately, Ivan died when Dmitri was quite young, leaving his wife to sup...
  • Mendeleev Periodic Table Elements Metals Chemistry
    650 words
    Dimitri Mendeleev & The Periodic Table Derived by Dimitri Mendeleev, the periodic table may be one of the most informational tables contained in chemistry. By leaving gaps in the columns and rows, Mendeleev was allowing for the discovery of undiscovered elements of that time. From the properties of the elements surrounding these gaps, Mendeleev was able to predict the properties of these undiscovered elements. Finally, when other scientists discovered the tools of the periodic table, Mendeleev's...
  • Alkali Metals Sodium Compounds Potassium
    1,027 words
    The six chemical elements that are known as alkali metals are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and the extremely rare radioactive substance called francium (Fr). Cesium and Francium are the most reactive elements in this group. The word alkali comes from the Arabic word al-q ili, meaning plant ashes. Plant ashes were the first source of alkali metal compounds. The alkali metals occupy the first column of the periodic table of the elements. Since these metals ...
  • Carbon The King Of Elements
    624 words
    When you look at the periodic table, you see a lot of letters, some numbers, different colors, and areas divided into rows and sections. There is one element on the periodic table that stands out above and beyond others, an element you should be greatful for it's discovery! That element, of course, being the one and only atomic number 6 Carbon! Now, you might be asking yourself what is so special about Carbon I don't even know what it does let alone it's importance to us! However, through out th...
  • Periodic Table Family Element Electrons
    323 words
    1. periodic law-law that states the physical & chemical properties of the elements are periodic functions of their atomic numbers 2. group-column of elements in the periodic table; family 3. family-column of elements in the periodic table; group 4. period-horizontal row of elements in the periodic table 5. metal-element that is a good conductor of heat & electricity, is shiny, has a high melting point, tends to lose electrons 6. luster-shininess 7. ductile-able to be drawn into a thin wire 8. m...
  • Table Of Elements Atomic Weight
    1,896 words
    A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements. Although elements such as gold, silver, tin, copper, lead and mercury have been known since antiquity, the first scientific discovery of an element occurred in 1649 when Hennig Brand discovered phosphorous. During the next 200 years, a vast body of knowledge concerning the properties of elements and their compounds was acquired by chemists By 1869, a total of 63 elements had been disc...
  • Your Chemical World Chemistry Products Made
    1,411 words
    Your Chemical World" In today's world we rely on many different facets to achieve what we normally don't even give a second thought. As I am sitting here typing this paper I am simultaneously using the culmination of numerous chemical breakthroughs. The American Chemical Society (ACS) is a group of over 150, 000 chemists, both academic and industrial. "Your Chemical World," a book that the ACS has published, is a biography of sorts, where in the uses and need for a chemical world are shown in an...
  • History Of The Periodic Table
    677 words
    Things are very different from each other, and can be broken down into small groups inside itself, which was then noticed early by people, and Greek thinkers, about 400 BC. Which just happened to use words like 'element', and 'atom' to describe the many different parts and even the smallest parts of matter. These ideas were around for over 2000 years while ideas such as 'Elements' of Earth, Fire, Air, and Water to explain 'world stuff' came and went. Much later, Boyle, an experimenter like Galil...
  • Your Chemical World Chemistry Made Products
    2,843 words
    ... Your Chemical World" In today's world we rely on many different facets to achieve what we normally don't even give a second thought. As I am sitting here typing this paper I am simultaneously using the culmination of numerous chemical breakthroughs. The American Chemical Society (ACS) is a group of over 150, 000 chemists, both academic and industrial. "Your Chemical World," a book that the ACS has published, is a biography of sorts, where in the uses and need for a chemical world are shown ...
  • The History Of The Periodic Table Of Elements
    2,780 words
    The History of the Periodic Table of Elements Dmitri Mendeleev and the early Periodic Table Dmitri Mendeleev was born in Tobolsk, Siberia, on February 7, 1834. He was the youngest of 14 children born to Maria Dmitrievna Korniliev and Ivan Pavlovich Mendeleev. His father was director of the local gymnasium. Maria Korniliev's family settled in Tobolsk in the early 1700's and introduced paper- and glass-making to Siberia. Unfortunately, Ivan died when Dmitri was quite young, leaving his wife to su...
  • How Computers Affect Our World
    979 words
    Dmitri Ivanovich Mendeleev was born in Tobolsk, Siberia, on February 7, 1834. Dmitri died January 20, 1907 at age 73. He was a blonde haired, blue-eyed boy, and the youngest of 14 children. His mother Maria Korniliev s family settled in Tobolsk in the early 1700 s and introduced paper and glass making to Siberia. Ivan Dmitri s father died when he was a young boy, leaving his wife to support the large family. So Maria had to find work to put the children to school. Maria s family owned a glass f...
  • Radon Periodic Table Of Elements
    597 words
    Radon is an element that is on the periodic table of elements. It is a member of the family called the noble gases, which is group number 18. Radon is a gas. It is a gas at 298 k. it is the heaviest known mononuclear gas at that temperature. Radon is also colorless. When it is cooled below the freezing point, radon exhibits a brilliant phosphorescence, which becomes yellow as the temperature is lowered. At the temperature of liquid air it is sort of an orang ish-red. The noble gases can be foun...
  • Chemical Elements Atomic Number
    1,547 words
    At first glance, nature appears to consist of countless numbers of very different materials. The world thus appears to be an extremely complex mixture of many different materials. But philosophers and scientists have long held another view of the world. They have found it difficult to believe that nature is really as complex as it appears to be. Instead, they have assumed that the many different materials we see result from the combination of a small number of fundamental substances called eleme...
  • Atomic Theory Energy Atom Elements
    2,881 words
    Throughout the ages the study of what we call today chemistry has evolved into a highly developed point of study. One distinct element of chemistry is atomic theory. Throughout the ages atomic theory has been developed and extended by many different men who were all well-known chemists and physicists in their day. They developed the study of atoms from pure conjecture into known facts. John Dalton originally was a schoolteacher in England. He thought about atoms as particles, which could make u...
  • Narrative Essay On The Periodic Table Of Elements
    832 words
    Chemistry November 18, 2002 The Periodic Table of Elements In September 1860 the birth of the Periodic table began. A group of the world's best chemists assembled in Germany to discuses the issues of atomic mass. At this meeting an Italian chemist, Stanislao Cannizzaro, introduced the right way to accurately measure the relative mass of an atom. After the new method was introduced chemists started to recognize similarities in the properties of various elements and placed them into famil...
  • Summary Of The Table Elements
    356 words
    In the early 1800 s, many attempts were made to organize the arrangement of the elements. By 1869 a Russian by the name of Dmitri Mendeleev published a periodic arrangement of the elements based in increasing atomic mass and in 1871 Mendeleev published a more elaborate table which was the prototype of the modern periodic table. In Mendeleev's table, he had also grouped the elements by matching similar properties. Although his table seemed to be ideal, there were many missing pieces. Mendeleev ex...