Glassware Safety… When heating a test tube, never point it in the direction of other people. Never look down into a heated test tube. Heating Safety… Hair spray and fingernail polish will burn easily. Use caution when working with a flame. Fire extinguishers are NOT to be used by student...
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amu The atomic mass unit (amu) is a relative mass value. It is equal to 1/12 the mass of the carbon-12 nucleus. The electron actually has a mass of 9.11 x 10-28 g. This mass is insignificant (1/1840) compared to that of the proton, or neutron, so it is given a value of 0...
Chemistry Laboratory Safety RulesProtect Your Eyes Appropriate eye protection must be worn at all timesWear appropriate
《Food for thought》PartⅡ ppt教学模板 Unit 1 Food for thought Part Ⅱ Using language——情态动词(1) 1 【思维导图】 2 一、基本特征感悟 【感悟用法】 1.Luckily,he was able to escape from the big fire in the end. 幸运的是,他终于逃出了大火。 2.I daren’t say that.Dare you go with...
Know the hazards of the materials being used. • Read and reread labels carefully to make sure that you are using the right chemical. • Know how to interpret data from a MSDS. Tie Back Loose Hair • Dangling hair can fall into the Bunsen burner and catch fire or can fall into a...
Industrialprocessesrequirelargeplantsforproductionofchemicals.Chemicalindustry •Theisolationofnaturaloccurringsubstancesforuseasrawmaterials.•Theprocessingofrawmaterialsbychemicalreactionstomanufacturecommercialproducts.•Theuseofchemicalstoprovideservices.Chemicaleng.&chemistry(I)•Laboratory:–Practicalityistypically...
of North Carolina and North Carolina State Univ. 学术奖(Academic Award) 1997 获奖项目 获奖者 奖项 年度 新千年的技术:开发与环境友好的灭火剂和冷却剂(Technology for the Third Millennium: the Development of an Environ. Responsible Fire Extinguishment and Cooling Agent) PYRPCOOL Technologies, Inc. ...
The Atomic Theory: All matter is made of atoms, which are particles too small to be seen. Each element has its own kind of atom. The evolution of the atomic Theory: 1.Dalton 2.Rutherford’s gold foil experiment 3.Bohr models 4.Quantum Mechanics All matter is composed of atoms Atoms can...