produced Examples of physical change are a change of size or shape, a change of state, and dissolving. A chemical property is a property of a substance that describes its ability to undergo changes to its composition to produce one or more new substances. A chemical; change is a change is the starting substance or substances and the production of one or more new substances. Evidence of chemical change includes; color change, odor change, gas production, precipitate production, energy change. A characteristic
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valid according to the rubric so I decided to go with something that has interested me since seeing a movie on it a couple years back. Blood diamonds are one of Africa’s largest problems and have been for many years now. The point my article stresses are that blood diamonds are one of the largest sources of income for rebel groups in Africa. “Conflict diamonds continue to fund the rebel groups, the National Union for the Total Independence of Angola (UNITA) and the Revolutionary United Front (RUF)
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CHAPTER 12: STRUCTURES AND PROPERTIES OF CERAMICS (Written Report) GROUP MEMBERS Alzate, Niel Aquino, Stef Bartolazo, Ronald M. Belen, Sinotriss Benjamin, Jessa BSIE III-I CHAPTER 12: STRUCTURES AND PROPERTIES OF CERAMICS (Written Report) Bartolazo INTRODUCTION Ceramic materials are inorganic and nonmetallic materials. Most ceramics are compounds between metallic and nonmetallic elements for which the inter-atomic bonds are either totally ionic, or predominantly ionic but
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CHANGE Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but cannot usually be used to separate compounds into chemical elements or simpler compounds.[1] Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes
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the number of outer electrons and the position of an element in the periodic table Topic 2 Ionic compounds and analysis ● Demonstrate an understanding that atoms of different elements can combine to form compounds by the formation of new chemical bonds ● Describe how ionic bonds are formed by the transfer of electrons to produce cations and anions ● Describe an ion as an atom or group of atoms
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Chapter 23 Haz Mat Study Guide Hazard Types TRACEM: Thermal, Radiological, Asphyxiation, Chemical, Etiological/Biological, Mechanical. Thermal Hazards Elevated Temperature Materials: In a liquid phase at or above 212'F, Intentionally heated heated at or above its liquid phase flash point of 100'F, In a solid phase at or above 464'F. Low Temperatures: Liquefied gases and cryogenic liquids (convert to liquids at or below -130'F) can freeze materials on contact. Radiological Hazards
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transfer of charged particles (electrons) is responsible for all chemical bonding. Physics is used to describe the physical characteristics of the new material, and physics sets the standards (of strength, density, malleability, etc.) against which the material under development is tested. The principles of chemistry come into play when choosing the elements and compounds used to develop the new material, based on their various chemical properties. 2. How do conductors and insulators differ in their
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In nature it’s found like a mixture of the isotopes Li6 and Li7. It’s the lightest solid metal; it’s soft, silvery-white, with a low melting point and reactive. Many of its physical and chemical properties are more similar to those of the alkaline earth metals than to those of its own group. | Sodium | Chemical element, symbol: Na, atomic number: 11 and atomic weight 22, 9898. It’s a soft metal, reactive and with a low melting point, with a relative density of 0, 97 at 20ºC (68ºF). From the commercial
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sometimes known as Protium or just hydrogen, hydrogen-2, also known as Deuterium and finally Hydrogen-3, which is also known as Tritium. Although each isotope has a different number of neutrons; 0, 1 and 2, respectively. This has no impact on their chemical properties. But, it does however affect the physical properties. Namely their mass. Whereas Hydrogen-1 has an atomic mass of 1amu, Hydrogen-2 has an atomic mass of 2, due to the presence of a neutron in addition to the proton within the nucleus.
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the magnifying power of the most powerful optical microscope in the world, we would still not be able to see an atom. 4. Chemical compounds are made up of about 100 distinct elements. Atoms are the smallest subdivision of matter that still retains chemical properties of a substance. A quark is the smallest particle that exists. Electrons form atoms that in turn determine chemical properties of a substance. 5. The number of protons makes an element distinct. 6. Brownian motion has to do with random
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