OCR gateway Core C1 revision notes Anything written in purple is for higher tier Exam tips are in red Fossil Fuels 3 types Coal (made from dead plants that lived millions of years ago) Crude oil (made from dead sea creatures that lived millions of years ago) Natural gas (made from dead sea creatures that lived millions of years ago) Key words to learn Non-renewable- fossil fuels are said to be this as we are using them up faster than they can be made Finite- these will run out if we
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Radioactive decay is the process by which an atomic nucleus of an unstable atom loses energy by emitting ionizing particles (ionizing radiation). There are many different types of radioactive decay (see table below). A decay‚ or loss of energy‚ results when an atom with one type of nucleus‚ called the parent radionuclide‚ transforms to an atom with a nucleus in a different state‚ or to a different nucleus containing different numbers of protons and neutrons. Either of these products is named the
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was the first woman to ever receive the Nobel Prize. In 1911‚ Marie Curie received her second Nobel Prize‚ this time in chemistry for the discovery of radium and polonium. Other than Marie Curie‚ Linus Pauling is the only other person to ever received two Nobel Prizes. Curie intentionally decided not to patent the process to extract and purify radium‚ leaving the door open to the scientific community to study the process unhindered. While being a brilliant scientist‚ Marie Curie also suffered from
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How did new theories in physics and psychology in the period from 1900-1939 challenge existing ideas about the individual and society? New theories in physics and psychology in the period from 1900-1939 challenged existing ideas about the individual and society. Many new philosophies and scientific discoveries challenged the teachings of the Catholic Church. Other scientific theories and discoveries challenged the way people thought of how the world worked. Realism and modernism frowned upon
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Methane‚ emitted by the digestion of food by animals‚ for example cattle. * Radon gas from radioactive decay within the Earth ’s crust. Radon is a colorless‚ odorless‚ naturally occurring‚ radioactive noble gas that is formed from the decay of radium. It is considered to be a health hazard. Radon gas from natural sources can accumulate in buildings‚ especially in confined areas such as the basement and it is the second most frequent cause of lung cancer‚ after cigarette smoking. * Smoke and
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explains how the doctors at the Hopkins hospital are working on getting a cure for cervical cancer. Their idea to cure cancer is to treat the tumor before it has become cancerous; they use Pap smear as a way to prevent cancer. It also explains how radium was used to destroy the cancer and many other things but it also kill the person that was been treated with that. The doctors at the Hopkins hospital start doing their own medical studies from patients without their consent. They also start using
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TABLE OF CONTENTS 1. IA (Alkaline Metals) 1.1. H………………………………………………………………………..2 1.2. Li………………………………………………………………………..2 1.3. Na………………………………………………………………………2 1.4. K………………………………………………………………………..3 1.5. Rb………………………………………………………………………3 1.6. Cs………………………………………………………………………3 1.7. Fr……………………………………………………………………….4 1. IIA (Alkaline Earth Metals) 2.8. Be………………………………………………………………………4 2.9. Mg………………………………………………………………………4 2.10. Ca………………………………………………………………………4
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of Howard W. Jones examined Henrietta and the lump in her cervix. He removed a piece of her tumor without telling her and sent it to pathology. Soon after‚ Lacks learned she had a malignant epidermoid carcinoma of the cervix. She was treated with radium tube inserts‚ which were sewn in place. It was during her radiation treatments where they removed two more pieces of her cervix - one healthy and one not - without her permission. The cells from her cervix were given to Dr. George Otto Gey. Dr.
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that the alpha and beta rays were tiny particles of matter. Rutherford then showed that the beta particles were electrons. In 1908 Rutherford demonstrated and made an airtight glass tube with very thin walls‚ and filled it with the radioactive radium emanation. Alpha particles could penetrate the thin walls of the tube and were collected in a second tube. Rutherford was then inspired to investigate more into Alpha Particles. Rutherford then began using alpha particles to investigate further
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priceless. When I did the research for this exam‚ I realized that many discoveries in chemistry would be used in medicine to prevent or to cure human diseases. For example‚ I respected Marie Curie‚ the female scientist who discovered the element radium. That element is used in X-Ray to diagnose diseases; in Radiotherapy‚ a treatment method using in Oncology; and in Radiopharmacy‚ “the use of radioactive drugs for diagnostic or therapeutic purpose”
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