Flashcards
Chapter 2
Cards in this deck (14)
- 1All matter is composed of atoms. Atoms are single units of special substances called ________?Elements
(Contain only one type of atom) - 2What does the atomic structure of an element determine?The chemical behavior
(The way it interacts with other elements) - 3What are a few of the 104 naturally occurring elements?Hydrogen, oxygen, carbon, copper, lead, silver and gold.
- 4Atoms of elements unite to form more complex structures called _________.Molecules
~Most matter is composed of molecules that contain 2 or more atoms
~The arrangement & structure of molecules are unique & determine the characteristic of that material - 5Thousands of substances can be produced by chemically or physically combining different proportions of basic elements. Such combinations of elements are form either a ________ or _______.Compounds or Mixtures
- 6Explain: CompoundsIs the product of 2 or more atoms that unite chemically. This creates a substance that has properties different from those of the combining elements.
example: Water is a compound of hydrogen and oxygen. - 7Elements in a compound are always in ________ proportions. Page 2-2Definite
- 8Explain: Mixture2 or more elements or compounds.. Unlike compounds a mixture can be formed using varying proportions of each ingredients.
Example: "Concrete" the mixture of cement, water and aggregate may vary but the mixture is still concrete. However the ratio may effect strength. - 9Explain: AlloysAlloys are mixtures of metal with other metals and non-metals.
Brass is copper + zinc - 10Define: cyclic loadingCyclic loading - the application of repeated or fluctuating stresses, strains, or stress intensities to locations on structural components. The degradation that may occur at the location is referred to as fatigue degradation
- 11Babbitt MetalAKA White Metal - soft, white non-ferrous alloy used to provide a bearing surface. It has properties that help reduce friction which make it a good material to use in a plain bearing
- 12Define: Non-FerrousGenerally more expensive than ferrous metals, non-ferrous metals are used because of desirable properties such as low weight (e.g., aluminium), higher conductivity (e.g., copper), non-magnetic property or resistance to corrosion (e.g., zinc)
- 13What kind of metal alloy is used for aircraft?Aluminum-Magnesium Alloy
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