➢ The periodic table gives us specific information about each of the elements‚ it gives us the symbol of each element (e.g. magnesium=Mg) and the atomic number either at the top or the bottom of the box. ➢ A atom is structured by the subatomic particles which are; ✓ Neutrons ✓ Protons ✓ Electrons Within the centre of an atom there is a nucleus which is made up of the protons and neutrons. But around the nucleus there is an ‘energy’ shell which is where the electrons
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ATOM Atoms are the basic building blocks of ordinary matter. Atoms can join together to form molecules‚ which in turn form most of the objects around you. Atoms are composed of particles called protons‚ electrons and neutrons. Protons carry a positive electrical charge‚ electrons carry a negative electrical charge and neutrons carry no electrical charge at all. The protons and neutrons cluster together in the central part of the atom‚ called the nucleus‚ and the electrons ’orbit’ the nucleus. A
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fundamental concepts in chemistry. It explores the structure of the atom‚ bonding between atoms/particles‚ the concept of the mole‚ redox reactions‚ kinetic theory and energetics. A laboratory component will be used to aid in the understanding of these topics. Course Rationale: CHEM 101 seeks to enlighten students about the historical development of the structure of the atom and the forces that keep subatomic particles together. It also looks at the importance of intramolecular and intermolecular forces
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age of the universe.[8][9][10][11] After this time‚ the Universe was in an extremely hot and dense state and began expanding rapidly. After the initial expansion‚ the Universe cooled sufficiently to allow energy to be converted into various subatomic particles‚ including protons‚ neutrons‚ and electrons. Though simple atomic nuclei could have formed quickly‚ thousands of years were needed before the appearance of the first electrically neutral atoms. The first element produced was hydrogen‚ along
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Chapter 5: Electrons In Atoms A. Models of the atom i. The Development of Atomic Models Protons and neutrons make up a nucleus surrounded by electrons Rutherford’s model or theory ( figured electrons move around the nucleus) His theory didn’t explain why metals or compounds of medals give off characteristics of colors when heated. Also didn’t explain why the atomic model could not explain the chemical properties of elements ii. The Bhor Model Bohr proposed that an electron is found in specific
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Review for Semester 1 Physical Science _____ 1. What is a system of knowledge and the methods used to find that knowledge? _____ 2. How are science and technology related? _____ 3. In which step of the scientific method is information obtained through the senses? _____ 4. What happens when data in an investigation do not support the original hypothesis? _____ 5. What do we call the best possible explanation that scientists can come up with for an observation or event. _____
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nuclear science. Fission and fusion involves the dispersal and combination of elemental nucleus and isotopes‚ and part of nuclear science is to understand the process behind this phenomenon. Adding up the individual masses of each of these subatomic particles of any given element will always give you a greater mass than the mass of the nucleus as a whole. The missing idea in this observation is the concept called nuclear binding energy. Nuclear binding energy is the energy required to keep the protons
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beginning of the universe. Modern measurements place this moment at approximately 13.8 billion years ago‚ which is thus considered the age of the universe.[2] After the initial expansion‚ the universe cooled sufficiently to allow the formation of subatomic particles‚ including protons‚ neutrons‚ and electrons. Though simple atomic nuclei formed within the first three minutes after the Big Bang‚ thousands of years passed before the first electrically neutral atoms formed. The majority of atoms produced by
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isotopes was confirmed. What property of electrons and protons led to their discovery? Suggest a possible reason why neutrons were the last of the three classic subatomic particles to be discovered. The property that led to the discovery of electrons and protons was their charges. Neutrons were the last of the three subatomic particles to be discovered because they have no charge and therefore it was harder and took larger for scientists to discover them. 2. Silicon occurs in nature in the form
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atoms could combine‚ react and move. They also suggested that they could obtain energy by splitting these particles. After the Indians‚ there was a Greek philosophers Democritus and Leucippus‚ who said that all atoms were made of the same material but different shapes and sizes. Then an Islamic philosopher took both the Indian and the Greek theories and suggested that there could be particles smaller than atoms. In the 1800s‚ John Dalton considered previous theories‚ who proposed that atoms of a particular
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