Chemistry has been the way of life for millions of years! It helps us develop new concepts of thinking and finding solutions to our problems. Did you know that fire was the first chemical reaction humans learned to use and control? (worldbook.com) Chemistry has helped our world come up with new, advanced technology to benefit us all. Chemistry played a role in developing the periodic table, x-rays, and the telescope.
Primarily, the Periodic Table of Elements was primarily thought to be developed by Dmitri Mendeleev. However, “Antoine Lavoisier first established the modern concept of the element in the late 1700s” (worldbook). Mendeleev published his version of the periodic table in 1869. Also, many scientists before Mendeleev tried grouping elements together that had similar characteristics between each other. For example, a German chemist grouped similar elements into groups of three. On the other hand, Mendeleev grouped elements by mass and properties. Later a chemist, by the name of Henry Moseley, said that elements should be grouped by their atomic number instead. As we all know, the atomic mass goes higher with the atomic number. Quantum mechanics affected the shape of the periodic table. The final changes of the periodic table were the elements we see that branch off. These elements are called the transuranium elements. I think without the development of the periodic table we may not have different types of medicines, or maybe just generic products to help us along the way of life. For example, humans need Zinc. A doctor can simply tell a person how much Zinc he/she needs or a simple nutrition label can tell how much of the element is in the product. With the development of the periodic table, it gave scientists l...
... middle of paper ...
...ywhere and be used for entertainment/hobby purposes. A parent can easily get his/her child excited for looking at the glowing stars at night. Training a child when he is young so that he can be wise when he grows old is a great proverb for situations as these. This means that if you encourage a child to try out science at a young age will help him succeed later in life.
In conclusion the history of chemistry has helped in the development of the periodic table, the x-ray machine, and simple telescopes. The cool thing about all that is that each of these discoveries are still around today and they just keep getting better. Each discovery helps improver every living creature’s life. Chemistry is life, and without chemistry there is no life. This is a very powerful statement, and I believe it holds to be true. Chemistry is found in pretty much every aspect of life.
Chemists are the specialists in chemistry, that interact with chemical properties, and reactions. The earth is made up of different gases. Some of this gases are needed for life in the planet but other gases can be harmful to the living. Gas’s use in regular quantities are favorable to the earth. The world started to become more advance and had to use more of this gases to produce everyday objects and inventions by men. Little did we knew this chemicals we going to affect us in our life. Chemist Jose Mario Molina actually discovered that chlorofluorocarbons were affecting the ozone layer.
During the cold winter of 1895, a German scientist by the name of Wilhelm Conrad Roentgen was working with a cathode-ray tube when he noticed nearby crystals were glowing. When Roentgen reached for the crystals he was amazed when the shadow cast on the crystal was not of his whole hand, but just his bones. Roentgen covered the tube with heavy black paper and saw that the crystals still glowed and the shadow of his hand bones still shown through, he then determined that a new ray was being emitted that could penetrate through thick materials. (1.) He later found that the rays could pass through most anything, but would cast a shadow of solid objects; these shadows could then be captured on film. Among the solid objects Roentgen shot with these rays was human tissue, the rays would penetrate the tissue, but the bones would cast a shadow, which could then be caught on film. One of Roentgen’s first experiments with X-rays was on his wife’s hand where, on the film, you could see her hand bones and her wedding ring. (1.) While the discovery of x-rays was a huge advancement in medical technology, they were not used in the medical field at first. Instead the mystical invisible rays that could penetrate solid objects were used in the industrial field.
The development of Periodic table begins with the German chemist Johann Dobreeiner. He collected similar elements together. His triads were groups of three similar elements for example: Calcium, Strontium and Barium in one group. He noticed that the relative atomic mass of middle element is the average of the two others elements. For instance example atomic mass of Strontium is 88, so if you add atomics mass of Calcium which is 40 and Barium which is 137 and divided by 2 you get 88 which is the exactly same atomic mass of Strontium.
Genetics relies on chemistry to explain phenomena related to the field. The structure of DNA relies on chemistry. In fact, when James Watson and Francis Crick discovered the structure of DNA, they did so by building models based on the laws of chemistry. Chemistry also relates heavily to the structure and function of one of the main products of DNA: protein.
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 Pavlovitch 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 support the large family. The death hit them hard economically especially for a large family, which meant that Maria had no other choice but to find work. Maria's family owned a glass factory and they allowed her to take over managing the company so she could support the family. Dmitri, being the youngest, appears to have been his mother's favorite child and was provided as many opportunities as she could afford. From his early years, she began to save money for Dmitri to attend the university.
Attempts to organize the elements began in the late 1800’s. At this time, about sixty elements were known. Much advancement would have been impossible if the basic model of the atom was discovered. Great progress came from Dmitri Medeleev – a Russian chemist. His first draft of a periodic table was only the product of him attempting to summarize his knowledge of the elements. Although not all of Medeleev’s ideas were one-hundred percent accurate, they created a solid base to build upon. Marie and Pierre Curie; a married couple from Paris were successors of Medeleev. Their interests were radioactivity and discovered radium. The true pioneers of the periodic table were Ernest Rutherford and James Chadwick. Rutherford formed the hypothesis that, “An atom must have a concentrated positive center charge that contains most of the atom’s mass.” Following Rutherford, Chadwick exposed a segment of the nucleus that was had no charge: the neutron. With the basic knowledge of the structure of an atom, the tedious work of putting the rest of the puzzle together continued.
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.
Dalton’s idea is that all things are made of small bits of matter, these bits of matter where too small to be seen even with a microscope. Scientists began to think these small bits of matter were responsible for chemical changes. They thought that when these bits of matter combined, a chemical change took place. Dalton assumed that there was a special pattern in the elements and was partly responsible for the periodic table. Dalton in 1787 started to keep a journal.
...ree careers make sure that every day activities do not lead to the degradation of the environment. For these reasons, it is clear that chemistry is beneficial to the way of mankind.
From the unit of chemistry in grade ten science, the students have learned many things from different types of elements in the chart all the way to how each element impacts the daily life each student or even adult lives in. Some of the things I as a student have learned include how to draw the different elements in a bohr rutherford diagram, balancing chemical equations, types of chemical reactions, and even information about the different types of acids and bases. Although there were many other things in the unit, these four definately helped me learn about chemistry in a more in-depth way, as well as teaching me something very new since these were some things a few of the students had never done in the previous years. Learning this in the classroom has really opened my eyes to the world in which we live in today, many times I leave the house on a cold day and as I look upon the cold water becoming ice or even the snow falling down, I know how it is happening, why it is happening, and I can even picture the molecules solidifying as we had seen in class with many different diagrams.
Chemistry is the most fascinating science to me. Chemistry applies to all things in the universe; living or non-living. Everything is made of elements which are made up of atoms of a certain atomic number. Thereafter I took AP Chemistry, I knew I had to choose a career in the field of chemistry. I understand and enjoy learning about chemistry. Chemistry is important, interesting, and ever expanding. Therefore, I must pursue a career in Chemistry.
I feel personally that the discovery of the atom was an important discovery for the world. With the discovery we are now able to answer questions we never even thought to ask. We are also answering questions some people asked long ago. We can now use our vast knowledge of the atom to measure the stars and be able to tell you what the stars are made of. The atomic discovery also helped us find our periodic table of elements. The periodic table of elements is a huge scientific chart that shows important facts with the help of its formation. There was a lot of constant scientific research that went into making the periodic table of elements and what it is today.
Then both Meyer and Mendeleyev built periodic tables alone, Meyer more impressed by the periodicity of physical properties, while Mendeleyev was more interested in the chemical properties. Then Mendeleyev had published his periodic table and his law in 1869 and forecasted the properties of the missing elements, and chemists then began to be grateful for it when the discovery of elements was predicted by the table that had taken place. Although, periodic tables have always been related to the way scientists thought about the shape and structure of the atom, and has changed over the years exactly for that reason.
The Periodic Table of Elements is commonly used today when studying elements. This table’s history begins in ancient times when Greek scientists first started discovering different elements. Over the years, many different forms of the periodic table have been made which set the basis for the modern table we use today. This table includes over 100 elements and are arranged by groups and periods. Groups being vertical columns and periods being horizontal columns. With all of the research conducted over the years and the organization of this table, it is easy to use when needed.
Throughout my school career I have always loved chemistry. In Chemistry there was always a sense that there was more, there was always something new and exciting to be discovered and theories to be proven (or even disproven). Chemistry was the main subject with a real practical aspect to it during school and it is this, along with my genuine fascination with the subject, which fuels my desire to study it further.