10 Facts About the Periodic Table of Elements

The periodic table is a chart that arranges the chemical elements in a useful, logical manner. Elements are listed in order of increasing atomic number, lined up so elements that exhibit similar properties are arranged in the same row or column as others. The periodic table is one of the most useful tools of chemistry and the other sciences. Here are 10 fun facts to boost your knowledge: Although Dmitri Mendeleev is most often cited as the inventor of the modern periodic table, his table was just the first to gain scientific credibility. ​It wasnt the first table that organized the elements according to periodic properties.There are  about  94 elements on the periodic table that occur in nature. All of the other elements are strictly human-made. Some sources state more elements occur naturally because heavy elements may transition between elements as they undergo radioactive decay.Technetium was the first element to be made artificially. It is the lightest element that has only radioactive isotopes (none are stable).The International Union of Pure Applied Chemistry, IUPAC, revises the periodic table as new data becomes available. At the time of this writing, the most recent version of the periodic table was approved in December 2018.The rows of the periodic table are called periods. An elements period number is the highest unexcited energy level for an ele ctron of that element.Columns of elements help to distinguish groups in the periodic table. Elements within a group share several common properties and often have the same outer electron arrangement.Most of the elements on the periodic table are metals. The alkali metals, alkaline earths, basic metals, transition metals, lanthanides, and actinides all are groups of metals.The present periodic table has room for 118 elements. Elements arent discovered or created in order of atomic number. Scientists are working on creating and verifying elements 119 and 120, which will change the appearance of the table, though they were working on element 120 before element 119. Most likely, element 119 will be positioned directly below francium and element 120 directly below radium. Chemists may create much heavier elements that may be more stable because of the special properties of certain combinations of proton and neutron numbers.Although you might expect atoms of an element to get larger as th eir atomic number increases, this does not always occur because the size of an atom is determined by the diameter of its electron shell. In fact, element atoms usually decrease in size as you move from left to right across a row.The main difference between the modern periodic table and Mendeleevs periodic table is that Mendeleevs table arranged the elements in order of increasing atomic weight, while the modern table orders the elements by increasing atomic number. For the most part, the order of the elements is the same between both tables, though there are exceptions.

Symbolism in The Scarlet Letter Essay - 1252 Words

Symbolism can be defined as a figure, character, or object that is used to represent complex or abstract ideas. By expressing an idea in the form of an image, the reader can visualize the concept more concretely. The old expression, â€Å"a picture is worth a thousand words,† applies to symbolism as the author creates a visual representation of ideas. The use of symbolism in Nathaniel Hawthorne’s The Scarlet Letter helps to illuminate the overall meaning of the work. At the beginning of the book, the reader is introduced to a dark and gloomy town that had first built a prison and a cemetery. Amidst the depressing landscape, is a beautiful rosebush. â€Å"But on one side of the portal, and rooted almost at the threshold, was a wild rose-hush,†¦show more content†¦Since Hester and Dimmesdale committed adultery, they are trapped in their life of isolation and misery. Just as Hester did during her imprisonment, she and Dimmesdale are like the prisoners staring out at the rosebush, dreaming of salvation and freedom. Later in the book, Pearl states that she was plucked from the rosebush and was born. Because of this, Pearl is the key to salvation for Hester and Dimmesdale, just as the rosebush is the key to salvation for the hopeful prisoners. The scarlet letter â€Å"A† was placed upon Hester Prynne’s bosom to openly and literally symbolize the adultery she committed. This letter was intended to make her ashamed of the sexual sin she had done when she bore an illegitimate child. The scarlet letter was a physical reminder for Hester and for her community of her sinful actions and how different she was compared to her Puritan society. Hawthorne stated that the scarlet letter placed on Hester’s bosom was made of â€Å"fine red cloth, surrounded with an elaborate embroidery and fantastic flourishes of gold thread,† done with enormous artistry, showing â€Å"fertility and gorgeous luxuriance of fancy† on the part of its creator† (Hawthorne 53). â€Å"It sets Hester completely apart from the rest of the community, taking her out of the ordinary relations with humanity, and inclosing her in a sphere by herself† (Baym 15) Consequently, the letter became not a symbol of shame but a symbolShow MoreRelatedSymbolism In The Scarlet Letter1247 Words   |  5 PagesSymbolism in The Scarlet Letter Symbolism is simply defined as the use of symbols to represent ideas or qualities. Symbolism is a common occurrence in literary works and many books use symbolism to express mystical ideas, emotions, and states of mind. As in most literary works, symbolism also appears in The Scarlet Letter. There is lots of symbolism used in The Scarlet Letter to convey multiple things and to express many ideas. Symbolism can be found everywhere in The Scarlet Letter and many ofRead MoreSymbolism Of The Scarlet Letter753 Words   |  4 PagesThe Scarlet Letter: Symbolism of the Scarlet ‘A’ Symbolism has many different meanings, and the Scarlet ‘A’ in â€Å"The Scarlet Letter† has many different meanings as well. Hester Prynne is the main character who is forced to wear the scarlet letter as remembrance for the crime and the sin that she has committed. This letter completely ruined her reputation in her community. How could a small piece of fabric do so much harm? This letter was a representation of something much greater than the letter ‘A’Read MoreScarlet Letter And Symbolism1045 Words   |  5 PagesThe Scarlet Letter and Symbolism Nathaniel Hawthorne uses many forms of symbolism in his book The Scarlet Letter. Symbolism is, according to Merriam-Webster, â€Å"the art or practice of using symbols, especially by investing things with a symbolic meaning or by expressing the invisible or intangible by means of visual or sensuous representations.† This means that the author was using objects to represent an action or idea. The symbols used in his book is either all physical or visible objects. ManyRead MoreSymbolism In The Scarlet Letter1401 Words   |  6 PagesSymbolism in The Scarlet Letter Symbolism is a literary style that uses symbols to represent ideas or qualities. Symbolism plays a very important part in The Scarlet Letter because it uses the characters to develop the main idea of the story. The symbols used by Nathaniel Hawthorne help the reader to visualize and understand the meaning of the story. Hawthorne uses Hester Prynne, Pearl, and Reverend Arthur Dimmesdale as symbols throughout the book. They are the main characters of the story andRead MoreThe Scarlet Letter Symbolism725 Words   |  3 PagesSymbolism of the â€Å"A† In the novel, â€Å" the scarlet letter†, Hester was being criticized by other women in her town. The people in Hester’s town believed that she had an affair with another man while she was in a relationship with her spouse and she was accused for being unfaithful and committed adultery with that man. Hester Prynne was forced to wear a scarlet letter â€Å"A† on her chest to show that she was unfaithful and that she committed adultery. The scarlet letter is a symbol of the sin she hadRead MoreSymbolism In The Scarlet Letter1101 Words   |  5 Pages Scarlet Letter Symbolism Essay Nathaniel Hawthorne was a writer in the 1800s, an anti-transcendentalist, and the great-nephew of John Hathorne, a judge in the Salem Witch Trials. Hawthorne is obsessed with Puritanism and, due to being obsessed, bases all his writings on Puritan towns. All of his stories take place in New England in the 1600s, before the Salem Witch Trials; The Scarlet Letter is one of these stories. In his novel, The Scarlet Letter, Nathaniel Hawthorne uses the symbolism of theRead MoreSymbolism in the Scarlet Letter3886 Words   |  16 PagesSymbolism of The Scarlet Letter A symbol is a literary device which is employed to portray another object or individual. In the Scarlet Letter by Nathaniel Hawthorne, it is most often a tangible object he uses to represent an undefined idea, complex in scope and significance. More times than not, it represents reverent, profound, or virtuous concepts of merit. From the substitution of one idea or object for another, to creations as massive, complex, and perp lexing as the veil in the Ministers BlackRead MoreSymbolism In The Scarlet Letter. Symbolism Is The Use Of1085 Words   |  5 PagesSymbolism in The Scarlet Letter Symbolism is the use of an object, character, or event to represent something else. Nathaniel Hawthorne, without a doubt, uses symbolism throughout the course of the novel, The Scarlet Letter. The novel takes place in a Puritan community in present-day Boston. Hester Prynne, Arthur Dimmesdale, Roger Chillingworth, and Pearl are the main characters. They all have major roles and without them, the novel would not be the same. Hester Prynne; married to Roger ChillingworthRead MoreSymbolism in The Scarlet Letter1079 Words   |  5 PagesFrom fairy tales to mythologies, fables to romance to even the simplest short stories of a third grader’s book, almost all of them often comprise a scheme of Heroes vs. Villains, and Good vs. Evil. Similarly, The Scarlet Letter by Nathaniel Hawthorne also contains many of the same situations and characters with their own symbolic meanings that allow them to express strong and demanding feelings through the symbols that they carry. Hester Prynne, w hom appears as a sinful woman, a shame to the societyRead MoreSymbolism Of Forest And The Scarlet Letter1051 Words   |  5 PagesSymbolism of Forest’s Aspects in Relation to the scarlet l`etter A In the Scarlet Letter Nathaniel Hawthorne discusses the hurdles Hester Prynne, the protagonist, goes through due to her sinful nature with her child, the mocking Puritans, and the past always creeping up on her. Often these obstacles appear when she is in the forest, making it a very critical locality in the book. Nathaniel Hawthorne brilliantly uses symbolism to convey how the three main aspects of the forest—the stream, the logs

In a few days Essay Example For Students

In a few days Essay In a Few DaysA year has past and now we stand on the brink of returning to a world where we are surrounded by the paradox of everything, yet nothing being the same. In a few days we will reluctantly give our hugs and, fighting the tears, say good-bye to the people who were once just names on a sheet of paper, to return to people that we hugged and fought the tears the say good-bye to before we ever left. We will leave our best friends to return to our best friends. We will go back to the places we came from and go back to the same things we did last summer and every summer before. We will come into town on that same familiar road, and even though it has been nine months, it will only seem like yesterday. As you walk into your old bedroom, every emotion will pass through you as you reflect on the way that your life has changed and the person you have become. You suddenly realize that the things that were most important to you a year ago does not seem to matter so much anymore, and the things you hold highest now, no one at home will completely understand. Who will you call first? Where are you going to work? Who will be partying with you on Saturday night? What has everyone been up to? Who from college will you keep in touch with? How long before you actually start missing people barging in without calling or knocking? Who will go with you to Dunkin Donuts at 5 a.m., if you get the urge? Who will go clubbing with you after hours? How long until you adjust to sleeping in a room by yourself, or how long before you realize that you best friends are not in the bed next to your room?Then you realize how much things have changed, you realize that the hardest part of college is balancing the two completely different worlds you live in, trying desperately to hold onto everything all the while trying to figure out what you have to leave behind. In the matter of one days time, we will leave our world of living with our best friends, walking across campus to eat at the UC, instant messenger being on 24/7, 8:00 a.m. classes (well, not for you), and perpetual procrastination, to a world that will seem foreign to us despite the fact that we have lived in it for nineteen years. But it is different now. We now know the meaning of true friendship. We know whom we have kept in touch with through out the past year and whom we hold dearest to our hearts. We have left our high school worlds to deal with the real world. We have fallen in love, we have had our hearts broken, and we have helped our best friends through the toughest times of their lives, something even their best friends at home could not be there for. We have stayed up all night just to be there for a friend. Whether it be listening and giving advice or cramming for an exam. We have partied the night away, doing stupid stuff (that our parents would be so ashamed at us for), but we were always there for each other afterwards. There have been times when we have felt so helpless being hours away from home when we know out families or friends needed us the most and there are times when we know we have made a difference. .u024bc2d1a4abc89b8dce496b78e7ee00 , .u024bc2d1a4abc89b8dce496b78e7ee00 .postImageUrl , .u024bc2d1a4abc89b8dce496b78e7ee00 .centered-text-area { min-height: 80px; position: relative; } .u024bc2d1a4abc89b8dce496b78e7ee00 , .u024bc2d1a4abc89b8dce496b78e7ee00:hover , .u024bc2d1a4abc89b8dce496b78e7ee00:visited , .u024bc2d1a4abc89b8dce496b78e7ee00:active { border:0!important; } .u024bc2d1a4abc89b8dce496b78e7ee00 .clearfix:after { content: ""; display: table; clear: both; } .u024bc2d1a4abc89b8dce496b78e7ee00 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u024bc2d1a4abc89b8dce496b78e7ee00:active , .u024bc2d1a4abc89b8dce496b78e7ee00:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u024bc2d1a4abc89b8dce496b78e7ee00 .centered-text-area { width: 100%; position: relative ; } .u024bc2d1a4abc89b8dce496b78e7ee00 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u024bc2d1a4abc89b8dce496b78e7ee00 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u024bc2d1a4abc89b8dce496b78e7ee00 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u024bc2d1a4abc89b8dce496b78e7ee00:hover .ctaButton { background-color: #34495E!important; } .u024bc2d1a4abc89b8dce496b78e7ee00 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u024bc2d1a4abc89b8dce496b78e7ee00 .u024bc2d1a4abc89b8dce496b78e7ee00-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u024bc2d1a4abc89b8dce496b78e7ee00:after { content: ""; display: block; clear: both; } READ: DOlls House EssayA few days from now we will leave. A few days from now we will take down our pictures and pack up our clothes. No more going next door to do nothing for hours on end. We will leave our friends random IMs and phone calls will bring us to laughter and tears this summer. We will take our memories and dreams and put them away for now, saving them for our return to this world. A few days from now we will return home. A few days from now we will unpack our bags and have dinner with our families. We will drive to our best

Research Paper on Animal Extinction Essay Example

Research Paper on Animal Extinction Essay Animal Extinction Phenomenon Animal extinction is a biological phenomenon, consisting in the disappearance (death) of all members of a particular species or taxon. Animal species that are subject to the threat of extinction are called endangered species. Extinction may be of natural or anthropogenic causes depending on certain environmental factors. Animal extinction is a relatively new problem as until yet recently people were killing as many animals as they needed for food or skins. With the growth of population the need increased, which more than once led to the extinction of some species. Only in the middle of the XVI century, people became aware that soon hunting grounds would be empty, and that was time the first restrictions on hunting began to be introduced. However, the prohibition pursued yet another goal: to continue hunting after the recovery of population. The very first bans prohibiting hunting and extermination of animals appeared not long before the end of the XIX century, when even in Europe some species began to be considered extinct: bison was at the edge of extinction, tour had disappeared back in 1627 as well as tarpan, which became extinct in 1918. The fact that a large number of species have become extinct during the last 150 years is a cause for concern. Current extinction rate is 10 to 100 times higher than in any previous periods of mass extinction in Earth’s history. If of these processes keep up the rate or speed up, the number of species at risk will be numbered in the millions in the next decade. While most people are willing to respond to the threat of extinction of certain mammals or birds, the most significant environmental problem is a threat to the stability of entire ecosystems, provided that the key species disappear at some level of the food chain. Destabilization becomes very probable, when some food chain links disappears from the system. When one species disappears, changes in the number of secondary species population are very probable. A situation may arise when the entire ecosystem will change significantly and irreversibly. We will write a custom essay sample on Research Paper on Animal Extinction specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Research Paper on Animal Extinction specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Research Paper on Animal Extinction specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Extinction of species is an important factor in a reduction in the wealth of nature as well as a moral problem for those who believe that people are obliged to maintain the natural environment (and those who believe that animals have rights). In many countries, there are laws that protecting such species from total extinction and aiding endangered species population recovery. In fact, only a few species at risk for extinction obtain legal protection. The position of most species endangered species does not receive an adequate response in the society. Use free sample research paper on animal extinction to understand better the chosen topic.