Periodic table Essays

  • Periodic Table Lab

    1360 Words  | 6 Pages

    Determination of the Periodic Properties of the Elements Introduction : Periodic Table shows the properties of elements are periodic functions of their atomic numbers. The periodic table contains alkali metals, alkaline earth metals, transition metal, basic metal, semimetal, non-metal, halogen, noble gases, lanthanides and actinides. The periodic table is important because it is organized to provide a lot of information about elements and how they relate to each other in one easy-to-use reference

  • Essay On The Periodic Table

    733 Words  | 3 Pages

    What is the periodic table: Our world is composed of many things. And these many things are composed of many other things. Everything on our earth is made of the elements of the periodic table (our earth is immense, imagine how important elements are!). Elements are substances that can’t be broken down or made into anything simpler by chemical reactions. The periodic table and its elements are both vital parts of chemistry and other sciences. The periodic table is basically a table that organizes

  • Mendeleev: The Periodic Table

    972 Words  | 4 Pages

    The periodic table that we know and use today is not the same periodic table we have always used. When the first periodic table was created in 1869, Russian chemist Dimitri Mendeleev had limited known elements making the table significantly different from the one we use today. Although both the Mendeleev periodic table and the modern periodic table look similar in shape, the organizational difference is what makes them unique. In Mendeleev’s time there were only 60 known elements. He knew there

  • Periodic Table Reflection

    727 Words  | 3 Pages

    The science lesson that I observed was over the elements on the periodic table. The students were given a packet to complete within the unit (this was a several day unit). The teacher had already went over the basics of the periodic table of elements in the days prior. She began the lesson by going on the ipad and showing the students how to do the activity. They had to build different elements on the ipad. First, they would pick something that they wanted to create (bananas and nylon were two of

  • Periodic Table Research Paper

    1087 Words  | 5 Pages

    The periodic table is a much more interesting concept than people give it credit for. Periodic means the repeating according to some pattern. The first periodic table is very different from the modern one. They are both very interestingly organized. The periodic table has the elements on them. The first periodic table was first introduced to us in 1869 by a Russian scientist named Dmitri Mendeleev. Mendeleev studied chemistry at the University of St. Petersburg. Mendeleev’s table had many differences

  • Periodic Table Research Paper

    805 Words  | 4 Pages

    By: Andrew Barton Periodic Table of Elements The periodic table was created in 1869 by Dmitri Mendeleev. He developed the table to illustrate the trends in properties of then known elements. The periodic tables purpose is to summarize the properties of real elements. Dmitri Mendeleev also arranged the elements known at the time in order of relative atomic mass. Today there are 118 elements on the periodic table; Mendeleev’s version had only 63 elements on it. The first scientific discovery of an

  • How Did Dmitri Mendeleev Build The Periodic Law

    720 Words  | 3 Pages

    development of the Periodic Law or table was found by many contributions from a variety of scientists. The contributions led to the discovery and establishment of the Periodic Table. Which help create the Periodic Table we use as of today. The person who created the Periodic Table was a chemist named Dmitri Mendeleev, but not without the help of a few other scientist who helped him get the idea by passing down information they had found. Mendeleev discovered the Periodic Table by trying to organize

  • Plutonium Dangerous Element

    988 Words  | 4 Pages

    information of the dangerous element; plutonium (Pu). Plutonium is a very fascinating element on the periodic table. It is fascinating regarding its toxic potency and involvement in weapons. Which is why I am choosing to do a paper on this element, people need to realize both how dangerous it is, what it is, how it came to be, and what it can do. Plutonium is in the transitional metals section of the periodic table. Plutonium has the atomic number 94 and a molar mass of 244, which implies that it has 94 protons

  • Difference Between Mendeleev And The Periodic Table

    1021 Words  | 5 Pages

    between Mendeleev’s periodic table (that was first started in 1869) and today’s modern style periodic table. Mendeleev is known as the father of the periodic table. He had published a periodic table just five years after John Newlands had put forward his law of octaves. Mendeleev didn’t do all of the work on the periodic table though. He had some “help” from a few other scientists, chemists, and geologists. Although he was the first person to publish the first version of the periodic table there was someone

  • Halogens Research Paper

    831 Words  | 4 Pages

    Halogens belong to group 7 in the periodic table, and are non-metallic elements. The term halogens mean “Salt former” which means that their combinations containing halogens are called Salts. All halogens have 7 electrons in their valence shell, giving them a charge of -1, and only require one electron to become a complete shell. Halogens are very chemically reactive which increases as you move up the periodic table – fluorine being the most active element. Halogens exist in room temperature in all

  • Molybdenum Research Paper

    536 Words  | 3 Pages

    Molybdenum was discovered by Carl Wilhelm Scheele in 1781 (“WebElements Periodic Table”). Molybdenum’s symbol, Mo, is fairly similar to its name. Boasting atomic number 42, Molybdenum sits in group 6, period 5, and is labeled as a transition metal, generally classified just as a metal (“Royal Society of Chemistry”). Though it doesn’t have any special roles in history, it is a very important element in today’s world, and has been since the manufacturing of steel became a big business. Its current

  • Thallium: Metallic Chemical Elements

    1098 Words  | 5 Pages

    Metallic chemical element chemically active, soft white color, symbol Cs, is located in the first group of the periodic table which means that he belongs to a group of alkaline elements. Atomic number 55 and atomic weight 132.905, the melting point of 28.4 degrees Celsius and a boiling point of 671 degrees Celsius and density of 1.87 g / cm 3. Cesium was discovered in 1860 by the German chemist Robert Bunsen, German physicist Gustav Kirchoff during the use of the spectroscope when they analyzed the

  • Rare Earth Elements Research Paper

    754 Words  | 4 Pages

    Rare earth metals are a group of 17 that are found together on the periodic table. The whole rare earth metals are made only of metals. the group consists of yttrium and the 15 lanthanide elements. The first element in row 6 is lanthanum which is where the lanthanide group got its name. The word "rare” can make you think that the world is lacking these elements but the elements are in fact relatively abundant in the Earth's crust but in limited, insufficient amounts. The rare earth elements group

  • Essay On Copper

    894 Words  | 4 Pages

    Copper is a solid metal found in group 11 in the periodic table. Humans first began to use this metal over 10,000 years ago. They used it to make weapons and later also coins, water pipes and ships. The Romans and Egyptians are known to have used copper in wide ranges. Copper was used for so long because it is relatively easy to mine and extract from its ore. When it is pure, copper is a soft, red metal, however it can be hardened if other metals are mixed to it. This product is then called an alloy

  • Mercury In Chemistry

    1033 Words  | 5 Pages

    This symbol is derived from the Latin word “hydrargyrum”, which translates to “liquid silver”. It is a silvery-white liquid, and is also the only metal to exist in the liquid state, under standard conditions of room temperature and pressure. The table below summarises some of the main properties of mercury. Chemical Symbol Hg CAS Number 7439-97-6 Atomic Number 80 Relative Atomic Mass 200.59 Density 13.6 at 20°C Melting point -38.87°C Boiling point 356.73°C Electronic shell [ Xe ] 4f14 5d10

  • Arsenic Research Paper

    1038 Words  | 5 Pages

    72 g/cm3. Arsenic has a melting point of 817.0 °C, and Its boiling point is 613.0 °C. Arsenic has a rhombohedral crystal structure, and it is usually found in a solid form while on earth. This element is found in group 15, p-block, on the periodic table, and Its period is period 4. Its electron configuration is [Ar] 4s2 3d10 4p3. B stands for beauty because, in The 1800’s arsenic was a huge beauty statement in Europe. It was originally found in Styria (

  • Gadolinium Lab Report

    1035 Words  | 5 Pages

    INTRODUCTION Gadolinium is a shiny silvery white, malleable, ductile, metallic, rare earth element which is located in group 3, f-block, period 6 and classified in the series of lanthanides in the elements of periodic table and has 27 isotopes whose half-lives are known with mass numbers from 137 to 164. This element is considered a rare earth element because there is such a small amount of it, and it is not found often in its simplest form. It was discovered in 1880 by Jean Charles de Marignac where

  • Ytterbium Research Paper

    1143 Words  | 5 Pages

    With atomic number 70, ytterbium can be located within the transition elements of the periodic table. At room temperature, ytterbium is a solid. It has three allotropes labeled by the Greek letters alpha, beta and gamma. The alpha allotrope has a hexagonal crystalline structure and is stable at low temperatures. The beta allotrope exists at room

  • Selenium Research Paper

    909 Words  | 4 Pages

    NEED FOR THE PROJECT Selenium (Se) is a chemical element with atomic number 34. It is a nonmetal with properties that are intermediate between the elements above and below in the periodic table. It is an important microelement, exists in small quantity in microorganisms, plants, animals and humans. It is an essential trace nutrient important to humans and most other animals and act as anti-aging, repairing cells, improving human immunity and preventing carcinogenesis but toxicity occurs when taken

  • Barium Sulfate Shielding Report

    1687 Words  | 7 Pages

    1. Introduction Barium is a dense alkaline earth metal in Group IIA of the periodic table that occurs in nature as a divalent cation in combination with other elements. Gamma radiation is best absorbed by dense materials consisting of heavy atoms such as lead and barium [1]. Two commonly found forms of barium are barium sulfate and barium carbonate, often found as underground ore deposits. Shielding aprons manufactured from environmentally-friendly barium sulfate as a potential substitute for the