Essay On The Periodic Table
explanatory Essay
594 words
Periodic Table History The Periodic Table is based around the Atomic Theory. Firstly people believed that everything was made up the four elements Earth, Fire, Wind, and Water. This theory evolved into everything being made up of atoms. Breakthroughs throughout history such as the discoveries of the nucleus, protons, neutrons and electrons have pushed this theory forward to where it is today. The Atomic Theory began in roughly 400BC with Democritus in Ancient Greece and is universally believed to be correct today. Democritus who was born in 460 BC and died 370 BC and is known as the father of modern science. Democritus proclaimed that everything is made up of atoms. He continued his theory to say that atoms will always be in motion, between atoms there is empty space, atoms are unbreakable, there are an infinite number of atoms all different sizes and shapes. He also said that iron atoms are solid and strong and have hooks to lock them together, water atoms are smooth and slippery, salt atoms have sharp jagged edges because of its taste and air atoms are light and spiralling. Since...
In this essay, the author
- Explains that the periodic table is based around the atomic theory. democritus proclaimed that everything is made up of atoms.
- Explains that since democritus scientists gained more knowledge on the atomic theory, they discovered that atoms contained electrons protons and a nucleus. this led to alchemists trying to make gold.
- Explains that dmitri mendeleev, born in 1834, was able to put all the elements in order and thus create the periodic table.
- Explains that henry mosely introduced the application of x-ray spectre to analyze the atomic structure. his application resulted in a more accurate periodic table.
- Explains that neils bohr, born 1885, is the next in the chain of contributors to the periodic table.
- Explains that james chadwick, born in 1891, is the person who discovered the neutron.
- Opines that there were many contributors to the periodic table history, although only a few are mentioned here. they can't wait for the next chapter to be revealed.
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- Essay On The Periodic Tableexplanatory essayIntroduction The periodic table, used worldwide by scientists, teachers and students, for quick location of information about elements. The periodic table did not come by overnight though, the periodic table is a table formed from years of work, on the atomic structure. It all started years back with Democritus and his discovery of the atom. This was followed up by John Dalton many years down the track, after elements had been discovered Dalton attempted to create a way to make the elements easier to remember.
In this essay, the author
- Explains that the periodic table is a table formed from years of work, on the atomic structure.
- Explains that democritus & leucippus proposed that everything in the world was made up of atoms. he formed views on the atomic structure, such as its shapes and connectivity.
- Explains john dalton's idea of creating a structured way of remembering all of the elements.
- Explains j.j. thomson's discovery of the electron in 1887, which led to the periodic table being based around protons, neutrons and electrons.
- Explains that mendeleev's ingenious invention of the periodic table has become a useful force in science today.
- Describes henry moseley's work on the periodic table, which baffled many chemists. he used an electron gun to continuously fire electrons at various elements.
- Explains that neil bohr's contribution towards the formation of the periodic table came in 1922.
- Explains how james chadwick discovered the neutron and proved the gamma ray hypothesis invalid. the periodic table has become a universally known and used table.
- States that democritus – early physics and philosophy of atomism.
- Explains democritus atom and john dalton's periodic tables.
- Explains the history of the periodic table. available at: http://www.rsc.org/education/teachers/resources
- Explains that dmitri mendeleevlaw of octaves (chemistry) -- encyclopedia britannica.
- Explains the history of the periodic table by dmitri mendeleev and henry moseley.
- Explains that neil bohr and james chadwick are both jewish virtual library members.
- Explains that henry moseley - wikipedia, the free encyclopedia. niels bohr | jewish virtual library.
- Explains that joseph john thomson is a member of the chemical heritage foundation.
- Explains that dmitri mendeleev history of the periodic table.
- Explains that dmitri mendeleev - wikipedia, the free encyclopedia.
- Explains democritus – early physics and philosophy of atomism.
- Describes john dalton's periodic tables, available at: http://www.sussexvt.k12.de.us/science/the%20history
1598 wordsRead More - Essay On The Periodic Tableexplanatory essayEvery human has a natural tendency to organize. The periodic table is a perfect example of how organization betters the scientific world. Much like a poem, it tells a significant amount of information in a condescended fashion. With this map of the basic elements of the universe, we can find out how many electrons the element has and how much it weighs. Each element has its own separate set of such data; no two elements are the same.
In this essay, the author
- Analyzes how the periodic table is a perfect example of how organization improves the scientific world.
- Explains that dmitri medeleev's first draft of a periodic table was only the product of him attempting to summarize his knowledge of the elements.
- Explains that the first modern periodic table was published in the middle of the twentieth century. dr. glenn seaborg discovered plutonium in 1940, which led to the detection of all transuranic elements.
- Explains the basic but important things that can be extracted from the periodic table. by looking at the atomic number it can determine how many protons or electrons are in the element.
- Explains the structure of the electron configurations. each energy level has sublevels or orbitals. as the atomic number increases, a new period begins.
- Explains that eighty percent of the periodic table is made of metals, while fifteen percent is composed of non-metals and the rest are metalloids. metalloids are semi-conductors used in the manufacturing of computer chips.
- Explains that there are three major metal groups: alkali, alkaline earth, and transition metals.
- Explains that becoming an element is not an easy task, since there are four unnamed elements.
- Explains that helium and hydrogen are the special elements that are nothing but exceptions.
- Explains that mendeleev knew his rough draft of a periodic table would be expanded. he left gaps in his table and predicted the characteristics of elements that scientists would eventually uncover.
- Explains that composing a chart that can tell you about any atom around you is mind-boggling. it took hundreds of years of fine tuning and trial and error.
871 wordsRead More - Periodic Table Research Paperexplanatory essayperiodic table is arguably one of the most important developments in the history of all science. Development of the table spanned over more than 2000 years beginning with the proposal by Aristotle around the year 330 BC that there is limited number of elements (though at the time he referred to them as roots) that make up everything in the universe, though he believed these elements to be simply "water, fire, earth, and air" and made no further contributions to the development and understanding of the table and its properties.
In this essay, the author
- Explains that the periodic table is arguably one of the most important developments in the history of all science. aristotle proposed that there are limited number of elements that make up everything
- Explains that hennig brand discovered phosphorus in 1669 through an alchemical process using urine to produce the fabled philosopher's stone.
- Explains that alexandre-émile béguyer de chancourtois was the first person to arrange chemical elements in terms of atomic weight.
- Analyzes how dmitri mendeleev organized the 63 known elements by relative atomic mass, valence and the modern periodic table.
- Explains that mendeleev and meyer are considered co-creators of the periodic table, though meyer's work was nowhere near as extensive for predicting new and undiscovered elements and their properties.
- Explains that the periodic table was mostly developed, but it was not without errors. henry moseley and glenn seaborg made major revisions of the table in the twentieth century.
- Explains that periodic law states that physical and chemical properties of the elements tend to recur in a systematic and predictable manner with increasing atomic number.
- Explains that metallic character is related to an element's ability to lose electrons, while nonmetallic character refers to a certain element. ionization energy, the energy required to remove an electron from an atom, increases when moving across the table.
- Explains that antoine lavoisier contributed to the development of the periodic table with the publication of traité élémentaire de chimie or elementary treatise of chemistry.
1700 wordsRead More - The Periodic Table: The Elements Of The Periodic Tableexplanatory essay"A periodic table is an arrangement of elements in which the elements are separated into groups based on a set of repeating properties." Basically it shows us all known elements in the world. For one to read the periodic table he should beware that the atomic number comes first in the square , and referring to the atomic number its the number of protons found in the nucleus of an atom. Following the atomic number is the symbol, which is usually the abbreviation of the element's name. For example Carbon is referred to as " C". Then, the element’s name is shown right after the symbol. Lastly, there's the mass number, which is the number of protons and neutrons in the nucleus of an atom. So simply for us to find the number of protons we automatically
In this essay, the author
- Explains that periodic tables are an arrangement of elements in which the elements are separated into groups based on repeating properties.
- Explains that the periodic table is divided into three categories: metals, nonmetals, and metalloids.
- Explains that electron configuration is an explanation of how electrons are arranged or organized around the nucleus of an atom.
1006 wordsRead More - Dalton's Atomic Theory Essayargumentative essaySimilar examples can be found in physics. Prior to the Michelson-Morley Experiment of 1887, which showed the constant speed of light, the experiments of FitzGerald and Lorentz, which explained the constant speed of light as the contraction of bodies and slowing of clocks, and the subsequent conclusion by Einstein that electromagnetic waves do not require a medium, scientists felt that light required a medium, and thus one was invented-ether (Hawking). These experiments demonstrate yet another aspect of a personal point of view in the pursuit of knowledge; the fact that despite the assumptions a personal point of view brings into a study, such as FitzGerald’s and Lorentz’s assumption that ether did, in fact, exist, knowledge can still be gained from such a study. Despite their assumption, they contributed, through their experiments, the knowledge that light does travel at a set speed. Thus, even when associated with false assumptions brought into an experiment, personal points of view are not always negative.
In this essay, the author
- Compares the michelson-morley experiment of 1887, the experiments of fitzgerald and lorentz, and einstein's conclusion that electromagnetic waves do not require a medium.
- Compares dalton's atomic theory with that of the greeks. aristotle believed there are four terrestrial elements, while democratus believed that a substance can be divided into smaller pieces.
- Analyzes how dalton's view that the greeks' "philosophical statements" must be proven with experiments and data has proven an asset to the pursuit of knowledge.
422 wordsRead More - History of the Periodic Tableexplanatory essayThe modern periodic table is very much like a later table by Meyer, but arranged, by Mendeleev’s, but it had to be according to the size of the atomic weight. The only thing though that was made by Mendeleev’s was Group 0, which was then added by Ramsay.
In this essay, the author
- Explains that things are very different from each other, and can be broken down into small groups inside itself, which was noticed early by people and greek thinkers about 400bc.
- Explains that both meyer and mendeleyev built periodic tables alone, while meyer was more interested in the chemical properties.
- Explains that the modern periodic table is very much like a later table by meyer, but arranged according to the size of the atomic weight.
- Explains how glenn seaborg named the heaviest elements in the periodic table actinide series, which allowed the proper placement of later created elements like the transactinides.
672 wordsRead More - Atoms and Radioactivityexplanatory essayThere we many theories on what atoms where and what they looked like. There have been many theories in the past. The theories started with “All matter was made of tiny, solid unbreakable particles.” And eventually ended with “An atom consists of neutrons and protons in the nucleus, with electrons surrounding it”.
In this essay, the author
- Explains that atoms are everywhere and we use them in everyday life. there are three different types of ionizing radiation: alpha, beta and gamma.
- Explains the importance of understanding atoms and radioactivity and how they are used to diagnose, monitor, and treat medical conditions.
- Explains that radioactive materials are dangerous if used in the wrong manner. radiation burns, cancer, and genetic damage are some of the risks.
- Explains that atoms and radioactivity can be used for medical purposes, energy sources, destruction of the environment, and damage to the world's inhabitants.
739 wordsRead More - Mendeleev's First Periodic Tableanalytical essayAlthough some of the elements have been known for thousands of years, our understanding of many elements is still young. Mendeleev’s first Periodic Table contained only 63 elements, and about that many were discovered in the following 100 years. Just like countries, emperors, philosophers, and cities, elements have histories, too.“The Disappearing spoon” by Sam Kean, is a detailed history of the elements on the Periodic Table. Kean does a important job of telling every single element’s journey throughout the history of mankind: from the earliest times, when chemistry was intermingled with alchemy, to these days of modern chemistry. For example: Thallium is considered the deadliest element, pretending to be potassium to gain entry into our cells where it then breaks amino acid bonds within proteins. The CIA once developed a plan to poison Fidel Castro by dosing his socks with thallium-tainted
In this essay, the author
- Explains that mendeleev's first periodic table contained only 63 elements, and about that many were discovered in the following 100 years. kean tells every single element’s journey throughout the history of mankind.
- Describes sam kean as a writer in washington, d.c. his work has appeared in the new york times magazine, mental floss, slate, the believer, air & space, science, and the new scientist.
- Analyzes how kean arranges the chapters by grouping the elements by function. each chapter consists of several elements with the same importance at a certain period of history or the ones that have similar uses.
- Analyzes how the book focuses on the history of the periodic table through stories showing how each element affected the people who discovered the elements, for either good or bad.
- Explains that in chemistry class this year we have learned a lot about the periodic table, what there atomic number is and what they are balanced together. the disappearing spoon is about how the elements were found.
498 wordsRead More - The Atomic Bomb in World War Twoexplanatory essayAtomic science began many centuries ago with ancient philosophers and alchemists experimenting and probing into the nature and structure of matter. Science began emerging when Thales of Miletus, the Ioian Greek in (634-546 BC) described the power of attraction in electricity long before electricity was known. In (460-370 BC) a Greek philosopher named Demoncritus was called the “father of the atom”. Although he had no experimental evidence to support himself, Demoncritus argued that all matter must consist of a number of fundamental pieces. He called these pieces “atoms” from the Greek word “atomon” which means indivisible. In (79 BC), the Roman poet-philosopher Titus Lucretius developed atomic theory. After the fall of the Roman Empire and
In this essay, the author
- Explains that the japanese attacked pearl harbor in 1941 and fought back against japan. president truman issued the potsdam declaration, which called for japan's unconditional surrender and listed peace terms.
- Explains that atomic science began with ancient philosophers and alchemists experimenting and probing into the nature and structure of matter.
- Explains that the atomic view of matter was lost in the middle ages. galilo's observations of falling objects and controlled experiments were regarded as the father of modern physics.
- Explains that different laws of physics govern the nucleus. the atomic bomb was the most closely guarded secret in scientific history.
- Describes how nagasaki suffered a similar transformation on august 9th, 1945. the survivors became known as "the most important people living".
- Opines that those who lived through this horrifying ordeal were the first true survivors.
- Explains that the japanese call those who survived the bombing hibakusha meaning “survivor or exposed one.” official japanese registries in the 1980’s recognized 368,259 survivors, of which 71% in hiroshima and 69% from nagasaki.
- Opines that japanese estimates state that 90,000 to 120,000 people died in hiroshima in the first four months after the bombing.
- Opines that counting the survivors should have been easier than counting the dead, but this too proved difficult. many survivors had substantive reasons for keeping their experience to themselves.
- Explains that in japanese society where marriages were commonly arranged, some families concealed exposure to secure desirable matches for their children.
- Explains that all the major wars of the 20th century, have had a hidden casualty, the environment.
- Explains that damaged landscapes have harmed human health, local economies, and ecosystems. the long-term effects of such environmental damage have not yet been fully determined.
- Opines that phytoremediation is the use of plants for environmental remediation, which involves removing organics and metals from soil and water.
- Describes how ground zero in hiroshima has been transformed into a peace park with beautiful greenery.
- Explains the potential benefits of absorbing metals from the ground and storing them in their tissues. as we approach the 21st century, human needs threaten the earth’s life supporting environmental resources.
- Opines that the next world conflict will be about a diminishing natural resource. the lesson and destruction seen in japan in the 1945 bombing triggered the world in this race to acquire nuclear technology.
- Opines that if the japanese and the rest of the world had witnessed a nuclear test, they wouldn't have killed hundreds of thousands of people.
1304 wordsRead More - Alice In Quantumland: Case Study: Alice In Quantumlandanalytical essayThe periodic table is a table of the chemical elements in which the elements are arranged by order of atomic number in such a way that the periodic properties of the elements are made clear. The standard form of the table includes periods, usually horizontal in the periodic table, and groups that are usually vertical. Elements in groups have some similar properties to each other. There is no one single or best structure for the periodic table but by whatever consensus there is, the form used here is very useful. The periodic table is a masterpiece of organized chemical information. The evolution of chemistry 's periodic table into the current form is an astonishing achievement with major contributions from many famous chemists and other eminent
In this essay, the author
- Introduces alice in quantumland through the television screen, where she encounters a world of photons and electrons. she then enters the heisenberg bank, which lends energy to its customers.
- Analyzes how alice meets up with virtual photons, the periodic table, and electron energy levels within the atom. she attends a party called the particle massquerade where particles whirl around and collide.
- Explains that an electron is a subatomic particle with negative electric charge that is equal, but opposite to, the positive charge of the proton. they are involved in chemical bonding and can flow through some materials as an electric current.
- Explains that photons are a discrete bundle of electromagnetic energy. they are unique and stand out from other particles because of their properties.
- Explains that the periodic table is a masterpiece of organized chemical information.
- Explains that valence and conduction bands are formed by the available energy states rather than discrete energies as in the case of free atoms.
- Opines that alice meets up with virtual photons and explores energy levels. an electron configuration table describes how many electrons are in each energy level of an atom.
1137 wordsRead More