Chemistry Review

2285 words - 10 pages

Chemistry

1.  5 points of the particle theory:
* 1. All matter is made up of tiny particle with empty spaces between them
* 2. Different substances are made up of different particles
* 3. Particle are always in constant random motion
* 4. Particles of a substance move faster as the temperature increases
* 5. Particles attract each other

2. Changing state from solid to liquid to gas:
* form a solid when the forces are strong enough to form a rigid shape
* they gain energy when heated and begin to move faster, when they can no longer hold each other, this forms the liquid state
* if they are continued to be heated the particles literally fly apart

3. ...view middle of the document...

Describing substances with physical properties:
* lustre: shininess (high) or dullness (low)
* optical clarity: ability to allow light through (transparent, translucent and opaque)
* brittleness: breakability (high) flexibility (low)
* viscosity: ability of a substance to pour readily
* hardness: ability to scratch or be scratched by another substance
* malleability: ability of a substance to be hammered into a thin sheet
* ductility: ability of the substance to be pulled into a fine strand
* electrical conductivity: ability of the substance to conduct electricity

7. Physical changes vs. Chemical changes:
* physical change: a change in which the composition of a substance remains unaltered and no new substances are produced
* chemical change: a change in the starting substance or substances and the production of one or more new substances

8. The 5 signs of chemical change:
* change in colour
* change in odour
* bubbles are visible that are not caused by heating
* a new solid is seen
* a change in temperature or light

9. Boiling, freezing and melting point:
* boiling point: the temperature at which a substance changes state rapidly from a liquid to a gas
* freezing point: the temperature at which a liquid turns to a solid
* melting point: the temperature at which a solid turns into a liquid

10. Density
* density: a measure of how much mass is contained in a given unit volume of substance
* how to calculate: dividing the mass of a sample by its volume = m/v

11. Element
* element: a pure substance that can not be broken down into a simpler
* example: if its on the periodic table

12. Compound
* compound: a pure substance composed of 2 or more different elements that are chemically joined
* example: water is composed hydrogen and oxygen

13. Metals, non-metals and metalloids and their properties:
* metals: located on the left and the central parts of the periodic table; generally lustrous, malleable and ductile, conduct heat and electricity (ex. Calcium, nickel, zinc.)
* non-metals: located on the upper right portion of the periodic table; usually gas or dull powdery solid, does not conduct heat or electricity (ex. Oxygen, carbon, chlorine, iodine.)
* metalloids: located along the staircase; has properties of both metals and non-metals (ex. Boron, silicon, germanium, arsenic, antimony, tellurium)

14. Main families in the periodic table:
* Alkali metals: found in group 1 of the periodic
* lithium
* sodium
* potassium
* rubidium
* cesium
* francium
* VERY reactive metals - rarely found as elements because they readily react to form compounds
* shiny, soft and low density (float on water)
* reactivity increases DOWN the column
* extremely reactive with water
* Alkaline earth metals: found in group 2 of the periodic table
* beryllium
* magnesium
* calcium
*...

Other Essays Like Chemistry Review

Intro Nutri Science Essay

705 words - 3 pages This is the first of four invited articles planned to provide a short introduction to the history of our science and a possible text for courses in the subject. Given the space limitations, I have concentrated on work most directly related to discovering nutritional needs and the qualities of foods in supplying them. Our science has greatly relied on developments in analytical chemistry and general physiology, but there are already histories

Water Resource Challenges Essay

622 words - 3 pages Associate Level Material Appendix E Water Resource Challenges Review Ch. 10 and 11 of your text, then complete the following: Provide at least three freshwater and three ocean water resource challenges by filling in the following table. Then, respond to the question that follows: |Freshwater Resource Challenge |Description | |Flooding

Characterizing the RNA-binding activity of MEX-5

2388 words - 10 pages OF AU-RICH mRNA-DESTABILIZING MOTIFS." Journal of Biological Chemistry 279.27 (2004): 27870-27877. 6. Draper, David E. "Protein-RNA recognition." Annual review of biochemistry 64.1 (1995): 593-620. 7. Farley, Brian M., John M. Pagano, and Sean P. Ryder. "RNA target specificity of the embryonic cell fate determinant POS-1." Rna 14.12 (2008): 2685-2697. 8. Gomperts, M., J. C. Pascall, and K. D. Brown. "The nucleotide sequence of a cDNA encoding

JSB Market Research – Acute Heart Failure - Pipeline Review, H1 2015

2011 words - 9 pages  Acute Heart Failure - Pipeline Review, H1 2015 Released on 11th May 2015 Summary Top of Form Bottom of Form Acute Heart Failure - Pipeline Review, H1 2015, provides an overview of the Acute Heart Failures therapeutic pipeline. This report provides comprehensive information on the therapeutic development for Acute Heart Failure, complete with comparative analysis at various stages, therapeutics assessment by drug target

Accounting

766 words - 4 pages : _________________________________________  Nutrition: _____________________________________    Chemistry: _______________________________________  Physics:_ _____________________________________    Economics: _______________________________________  Psychology: ___________________________________    History:__________________________________________  Other: ________________________________________    List any relevant tutoring and/or leadership experience you have had

Cement Clinker Grinding Unit Manufacturer India

934 words - 4 pages cement is a binder, a substance that sets and hardens as the cement dries and also reacts with carbon dioxide in the air dependently, and can bind other materials Cement Dealers in Chennai and Tamilnadu - Ramco Cement Rain Commodities Limited is a leading producer of cement in South India since 1986. The Company markets cement under the brand “Priya Cement” in Andhra, Karnataka CemNet - International Cement Review - News, Events & Online

Marketing

1714 words - 7 pages .   This “You Decide” report presents the analysis of marketing suggestions submitted by the marketing directors at Graves Enterprises. Their suggestions are a review of primary and secondary research conducted to help determine a marketing strategy that will double sales in both the consumer and commercial markets of Grave Enterprises within the next year. The first analysis is aimed at the consumer market, while the second is an analysis at how to

History of Psychology

1518 words - 7 pages psy 101 The History of Psychology The History of Psychology                                                                                    In order to discuss Psychology's history, it is important to   understand that psychology still does not have one unifying approach   unlike the natural sciences; even the definition of Psychology and   what it truly means is still undecided. However I shall attempt to   review chronologically its

Information Technology

3389 words - 14 pages course requirements to get into a school of veterinary medicine vary between the schools. All of them are science intensive. Most require a well-rounded education. The University of California at Davis school of veterinary medicine requires one year of general biology, one year of general chemistry, one year of organic chemistry, and one year of physics as far as lower division requirements. Upper division requirements include a semester of

Periodic Table

2732 words - 11 pages they credited Mendeleev.[8] Mendeleev's table Dmitri Mendeleev Mendeleev's 1869 periodic table; note that his arrangement presents the periods vertically, and the groups horizontally. Russian chemistry professor Dmitri Mendeleev and German chemist Julius Lothar Meyerindependently published their periodic tables in 1869 and 1870, respectively. They both constructed their tables by listing the elements in rows or columns in

Harvard Business

4578 words - 19 pages around by refocusing her attencommon triggers of hormonal the time to understand the biology tion on her staff’s emotional needs and surges. In fact, when laboratory of their emotions. fine-tuning her communication style. The Chemistry of Stress 80 Harvard Business Review 1445 Goleman.indd 80 | September 2008 | hbr.org 8/1/08 3:22:33 PM The way to develop your social circuitry is to undertake the hard work of

Related Papers

Lit Review

4423 words - 18 pages be non-longitudinal because it focuses on now rather than following student from the beginning or their educational journey. The next study addresses the factors affecting attitudes of students towards chemistry. In the research article by Banya (2005), three areas were addressed. First, are young female students who are knowledgeable about the usefulness of chemistry more likely to have self-confidence towards chemistry in high school

Marketing Essay

1129 words - 5 pages , the Graves products reduce mold.  Graves products utilize environmentally friendly chemistry, contain “Scotchgard” for continued stain protection.  In addition, they are hypoallergenic, and offer a pleasant citrus aroma for up to three months after used. As the new Vice President of Marketing, YOU are tasked with doubling sales in both the consumer and commercial markets within the next year.  |Your Role/Assignment

Analyzing Buyer Behavior Essay

1104 words - 5 pages reduce mold. In addition, the Graves products reduce mold. Graves products utilize environmentally friendly chemistry, contain “Scotchgard” for continued stain protection. In addition, they are hypoallergenic, and offer a pleasant citrus aroma for up to three months after used. As the new Vice President of Marketing, YOU are tasked with doubling sales in both the consumer and commercial markets within the next year. Your Role/Assignment

Desulfurization Of Kerosene Literature Review

1732 words - 7 pages ABU GODWIN ITAKPE PSC0904473 TOPIC: DESULPHURIZATION OF KEROSENE LITERATURE REVIEW INTRODUCTION Refining of crude oil to final products requires desulphurization of the oil. Fuel specifications that govern transportation fuels have over the years become increasingly stringent with respect to sulphur content. Many petrochemical products are likewise produced to be almost sulphur-free. The removal of sulphur from oil is consequently one of the