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30 Cards in this Set
- Front
- Back
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The sum of the number of protons and neutrons in the nucleus of an atom is?
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mass number
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How do u find the mass nimber of an isotope?
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?
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Is bronze an alloy?
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yes
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What property does pure gold have that is the reason for it not being used for jewelry? it is too___?
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soft
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What is a natural polymer that gives shape to plant cells?
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?
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What is the process of making an alloy by firing a beam of ions at the surface of a metal?
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?
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Copper telephone and cable television lines are being replaced by what materal?
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optical fibers
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What kind of particle has the same strucuture as a helium nucleus?
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?
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What one advantage do alloys have over pure metals?
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?
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Atomic nuclei of unstable isotopes do what during radioactive decay?
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?
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What is an alloy of iron with other elements?
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?
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Dentists fill cavities with an alloy called amalgam. What is amalgam made of?
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mercury and gold or silver
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Measurements of half-life make radioactive isotopes useful for
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determining the age of rocks and the fossils found in them
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What is the reason radioactive isotopes can be followed through the steps of a chemical reaction or industrial process?
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?
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What is a radioactive isotope that can be followed through the steps of a chemical reaction?
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?
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What is a useful property of ceramics? They have the ability to...
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resist moisture, dont conduct electricity, and can withstand temperatures higher than molten metals
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What is the main ingredient used to make glass?
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sand
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Ceramics are made by heating____ and other minerals to higher temperatures?
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clay
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Resisting moisture,do not conduct electricity and can withstand high temperatures are descriptions of ____
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ceramics
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Is plastic a synethic polymer?
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yes
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When making an alloy by mixing the elements as powders and them heating them provides what kind of advantage?
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?
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The length of time needed for half the atoms in the sample to _____ is the half-life of an isotope.
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decay
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What is on the outside of the space shuttle made of?
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aluminum
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When a polymer is combined with one or more substances what is the new material called?
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?
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What is steel combined with one or more elements?
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?
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C and C. IS this an example of a pair of isotopes?
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?
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What is a clear,solid material with no crystal sturcture?
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glass
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Is "reacts readily with air" a characteristic of steel?
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?
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What is a treadlike piece of glass that is used to transmit light messages?
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optical fiber
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You will be shown 6 models and asked to identify the models of polymers? Hint: What do molecules form?
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?
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