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30 Cards in this Set

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