The Theory Of Atomic Theory Essay - 2125 Words

Emily Elliott Scientists who Contributed to Atomic Theory 20 September 20 What is Atomic Theory? Atomic theory is the theory that all matter is made up of tiny indivisible particles called atoms. This paper will discuss its beginnings and some of the scientists who made major contributions to how it is defined today. Background Since the earliest of times, scientists and philosophers have known that the universe is more than just what it appears to be, but instead there is a deeper, more complex makeup beneath the surface. The ancient Greeks called it â€Å"the four elements†2, though some, like Democritus, believed that everything was made of tiny indivisible particles called atoms.3 Later, however, with advancements in technology, scientists such as John Dalton, JJ Thomson, Ernest Rutherford, and James Chadwick were able to prove the existence of an indivisible particle with a dense, positively charged nucleus consisting of protons and neutrons with electrons orbiting the nucleus.1 With this knowledge, others were able to dig deeper, and discover so much more about atomic theory, such as Brown’s equation for the motion of an electron,6 Dirac’s discovery of the positron,11 Fermi’s research in nuclear fission to create the atomic bomb,13 and Gell-Mann’s discovery of the q uark.14 Each discovery made by these men has shaped the world in some way or another, and even now more discoveries are being made, but only because of the foundation laid out by those who set atomicShow MoreRelatedThe Atomic Theory1649 Words   |  7 PagesThe history of the atomic theory is thoroughly extensive. It had all started around 400 BCE when few people believed in an atomic theory, that atoms are building blocks. Democratic believed matter was made up of tiny particles. He called them atomos. Democratic is Leucippus’ most infamous pupil Later in history, the law of definite proportions was discovered. Two samples of given compounds are made of the same elements in exactly same proportions by mass regardless of the size or sources of the samplesRead MoreAtomic Theory1729 Words   |  7 PagesAssignment: Atomic Theory 1. Write the complete symbol and determine the no. of electrons, protons and neutrons of the following e- p+ n a.) Oxygen - 8 8 b.) Cesium - 55 55 c.) Argon - 18 18 d.) Uranium - 92 92 e.) Copper - 29 29 2. Calculate the atomic mass of sulfur from its natural isotope. f.) Sulfur-36 g.) Sulfur-32 h.) Sulfur-33 i.) Sulfur-34 3. Complete this table. Symbol of Elements | Atomic Number | Atomic Mass | #Read MoreThe Nuclear Theory Of The Atomic Theory1363 Words   |  6 PagesThe Atomic Theory The atomic theory is a fundamental scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms, which came from the Greek word atomon, meaning ‘uncuttable’. This theory was based on the concept that any given item in the universe could be broken down using pico- and femtometer atomic/subatomic/alpha particles. If this idea had never been composed, science would have suffered as a result and many scientists would not have beenRead MoreThe Nuclear Theory Of The Atomic Theory Essay2134 Words   |  9 Pages The Atomic Theory’s Scientist are Mostly German Thomas Britton Kate Caufield New Albany Mr. Mumaw’s 6th Period Chemistry  Abstract The atomic theory has been worked on since around 400 BC. It is a theory that helps us to understand what everything in the universe is made of and what those particles are made of. It also helps us to describe the relationship between the sub-particles and how they may contribute to different aspects of the atom, like it s mass or charge. These atomsRead MoreThe Physics Of The Atomic Theory1404 Words   |  6 PagesScientists work? Why? I believe that the scientists before Rutherford would have inspired him to investigate in Atoms. This may of occurred because there was a conspiracy towards the atoms due to nobody actually seeing them. What part of the Atomic Theory did they investigate? Ernest Rutherford was responsible for a many different discoveries such as radioactivity and nuclear physics. He discovered alpha and beta rays, found the laws of radioactive decay, and identified alpha particles as heliumRead MoreThe Physics Of The Atomic Theory964 Words   |  4 Pagesenergy in all kinds of matter. The atomic theory became a very important piece in chemistry because it explained the atomic structure and how it worked. Important scientists that helped contribute to this theory were people like John Dalton and J.J. Thompson which helped establish a foundation to the theory, as well as create experiments that helped provide evidence of their findings. John Dalton was an important scientist that established the atomic theory. His theory was as follows: 1.All matter isRead MoreThe Physics Of The Atomic Theory1519 Words   |  7 Pages â€Å"What is the world made of?† That question has puzzled scientists and philosophers for centuries. The atomic theory was first proposed in ancient Greece around 400 BC and has continued to evolve through the centuries to finally evolve into the current theory we have today. We now know that the subatomic particles that make up the atom are no longer the fundamental particles of the universe because even they are made of smaller particles called â€Å"quarks.† The continuous study of atoms will allow usRead MoreThe Physics Of Atomic Theory1142 Words   |  5 Pagesdevelopment of atomic theory, and made science changing discoveries that are still today quite impressive, even in comparison to modern day scientists. There are countless scientists involved in the evolution of atomic theory, but less than 50 have majorly impacted the way we view atomic theory today. Discovery and experimentation on the atom first began in the Greek Era with scientists as old as Democritus and Aristotle. Democritus was believed to be the first person to touch on the atomic theory. He statedRead MoreThe Physics Of The Atomic Theory1297 Words   |  6 Pagesresearch of numerous chemists and physicists. The atomic theory is the building block to the study of matter, just as the atom is the building block to all matter. Around 400 BCE was when the Greek philosopher Democritus, alone with his teacher Leucippus, the idea of the atom was born (the word atom comes from the Greek word â€Å"atomos† or â€Å"atomon† meaning â€Å"that which cannot be split†). This was a completely new concept, and Democritus’s theory stated that atoms were indestructible and homogenousRead MoreThe Physics Of The Atomic Theory800 Words   |  4 Pages Atomic Theory The ancient Greek the word atom means indivisible. It was used to describe the smallest indivisible piece of a matter. He believed that all matter could be broken down using femtometers. Atoms were perceived to be indestructible. Atom was derived from the greek word atomon or atomos meaning indestructible. This fundamental atomic theory was developed by a scholar named Democritus. He was a pupil of the famous philosopher Leucippus. From Democritus’ original Atomic Theory