Alpha particle

Dalton, but it was first discovered by a Greek philosopher named Democritus in 400 BCE. Democritus stated that matter was made of small hard particles called atomos. John Dalton’s theory can be called modern because it can be proven through experiments. John Dalton pointed out some major details about the atomic theory; All matter is composed of very small particles called atoms, atoms of a given element are identical, atoms can’t be created nor destroyed, atoms can combine or separate from…

So why do these compounds produce well defined proportions instead of combining random proportions, say 6:13 and 7:30? These constant proportions suggest that their is the existence of tiny particles, which have specific rules about how they react. So this provides us with some evidence that these particles could exist. The Bohr Model of atoms however, shows atoms to exist mostly of empty space, with a with a tiny nucleus at the…

sort had never been observed and it was known that in regular circumstances protons and electrons do not annihilate each other, so it was hard to believe that happened in a star. The next theory was proposed after nuclear reactions were observed in particle accelerators. Atkinson and Houterman's theory of thermonuclear reactions partially described the processes that happen when a nucleus splits. Because of the nuclear evidence it was assumed that this was the type of reaction that happened in…

Nuclear Energy Nuclear Energy Nuclear Power Plants: Nuclear Power Plants are facilities which generate electricity through the use of nuclear reactions. It is referred to as a thermal power station because it creates a nuclear reaction, in which a lot of heat and energy is created. Due to the production of heat, the plan creates a lot of steam which is used like in coal or gas-fired power stations to drive turbine generators to generate electricity. Nuclear Reactions The are two nuclear…

Tiny particles react with each other every second to sustain our daily lives. These particles are called atoms, and they are the most basic and indivisible units of matter. They retain their identity through chemical reactions, yet they are so small that even the strongest microscope cannot detect them. The reasoning behind atomic reactions intrigued many intellectuals. To understand more about this concept, they had to comprehend the compositions of these particles. Although the scientist and…

Introduction: The “wonder” drug is what it was called. They believed it was like magic. It glowed in the night, it was presumed to cure cancer, it even was thought to give you eternal life, but for many innocent young girls in the 1920's, it was anything but wonderful and exquisite(Prisco). It was fatal. The chemical Radium and the Radium Girls is an event that not only affected the lives of many of these young girls but thousands of others globally who believed that radium was once one of the…

The Physics of PET Scans All elements are composed of atoms, which are composed of small particles called protons, neutrons, and electrons. The nucleus of an atom is made of a tightly packed collection of protons and neutrons. You would think that with positively charged protons being packed so closely together the nucleus would fall apart, however this is not the case. There is an attractive force called the “nuclear force” which is able to overcome the repulsive force of the adjacent…

they couldn’t visualize these electrons “jumping” orbits within an atom. They needed something that would actually back up the idea. Erwin Schrodinger decided something was not right with this model either. Schrodinger showed that electrons weren’t particles moving in an orbit at all and they certainly weren’t skipping orbits. He felt this model explained a hydrogen atoms’ spectrum, but the model needed more to understand about more difficult atoms. He believed no one was sure whether you could…

surrounding energy shells which consist of negatively charged electrons. The electron was discovered in 1897 by J.J. Tomson, and was the first proved element of the atom. The nucleus is made up of the proton, a positively charged particle, and the neutron, a particle with no charge. The proton’s existence was confirmed by Rutherford while the neutron was discovered by physicist, Sir James Chadwick. Knowledge of the atomic…

In 1896, Henri Becquerel expanded the field of chemistry so nuclear changes would be included, after he discovered that uranium could disembogue radiation. Not very long after his discovery, Marie Curie began studying in the field of radiation, and completed most of the pioneering work on nuclear changes. Marie Curie discovered that radiation was related to the amount of radioactive element that is present, she also discovered that radiation was a property of atoms. Curie was the first woman to…