Periodic Table Essay

Preliminary Chemistry Assessment Task 1 Jessica Kuang 11CH3   Question 1: (4 marks) Construct a timeline to summarise the development of the Periodic Table and the major contributions made by notable scientists (up to G Seaborg)   Question 2: (8 marks) (a) The elements lithium, sodium and potassium formed one of the original triads used to show that elements could be ‘grouped’. What scientific evidence did scientists have to justify this grouping of elements? Johann Dobereiner

Part A HISTORY of the PERIODIC TABLE Antoine-Laurent Lavoisier discovered both hydrogen and oxygen, although it is said that Henry Cavendish had earlier uncovered hydrogen. Lavoisier also helped create the metric systems (source 1). He wrote the first extensive list of elements containing 33 elements and distinguished metals and non-metals (source 5). Him and his area of work were particularly interested in compounds, element weight and chemical reaction (source 6). Dimitri Mendeleev arranged

sciences to learn, and one aspect of which that may seem to be the most daunting is the Periodic Table. But in the national bestselling novel The Disappearing Spoon by Sam Kean, he uses a variety of topics to explain the organization, properties and other concepts related to the Periodic Table. In the chapter Elements in Times of War, Kean refers to historical events throughout history to show how the Periodic Table has influenced the way mankind has waged war. Through his use of historical anecdotes

According to the periodic table Mendeleev created, he organized the elements in rows and groups based on the atomic number. In addition to this table, the periodic law was created by the scientist, Henry Moseley. This law stated that an element's properties are the mechanisms of its atomic number. The periodic table is structured in certain ways. In a period, the atomic radius decreases as the atomic number increases

Background: The periodic table was a display of all known elements ordered in increasing atomic number. The modern periodic table has groups, a column of elements, and periods, a row of elements. Elements within the same group have similar chemical properties because they all possess the same amount of electrons in the highest occupied energy level, also known as valence electrons. Due to the fact that chemical properties are determined by electron configuration, elements in the same group will react

The element I have chosen for our Atomic Structures And The Periodic Table Project is the element copper. Copper is one of the first metals ever to be handled by human hands and till this day is still one of the most important metals in the industry. Copper gets its name from the Latin word “Cuprum” this words meaning is from the island of Cyprus. Cyprus is an island where the Romans mined for copper in the ancient times. Copper is an transition metal with the atomic number twenty nine. Copper has

Hydrogen is the most abundant chemical element in the periodic table among the other elements, it was found in the Sun, other stars and the gas planets that is in our solar system. It usually occurs naturally on Earth, but not it is not giving out in large enough quantities to be produced. So therefore hydrogen needs to be separated from other elements. The history of hydrogen was started by Robert Boyle who produced hydrogen gas in 1671 while he was doing and experimenting with iron and acids

Periodic Table Research Task By Kevin Shaji Part A. You are to research the task below and submit as a written piece of work i) John Dalton proposed his atomic theory in 1808. Outline his theory. (4 marks) ii) Explain which part of Dalton’s atomic theory was later found to be incorrect. (3 marks) iii) Dalton developed a way to measure the relative atomic mass of the different elements. Using examples research and describe the meaning of the term ‘relative atomic mass’. (3 marks)

the Russian chemist Dmitry Mendeleyev organized the elements in a table according to their atomic weights. Dmitry Mendeleyev organized the elements based off their physical and chemical properties. In the experiment, the similarities and differences in the properties of the representative elements in Group I, II, III, AND IV is observed. The trend in the acidity or the basicity of the elements in the third period of the periodic table are observed using H2O and HCl. The purpose of the lab is to explore

of your life a basic element is used. There's not a day that goes by that you can survive without some of the elements on the periodic table. For example the air we breath is made up of elements, we can not live without oxygen, when we go to the dentist, we get our teeth covered in fluoride. The Periodic Table is basically built like a sectional grid. On the periodic table the elements are arranged in eight sections in order of atomic number which allows scientists to clearly identify the properties