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32 Cards in this Set

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  • Back
name 5 properties that can be used to distinguish between 2 different elements
melting point, boiling point, denstiy, reactive w/oxygen in air and acid, conductors of thermal/electric current
how could you seperate alcohol and water(these liquids are diff temps)
distillation
what is a solution
a mixture that appears to be a single substance but is composed of particles of 2 or more substances that are distributed evenly among each other.
name 3 differences between plasma particles and gas particles
-plasma is made of broken particles
-plasma is hotter(moves faster)
-plasma is made of charged particles; gas is neutral
which element is most common in making semiconductors
silicon
what is a solute
substance that is being dissolved
how does the behavior of a pure element compare to the behavior when it's a compound
pure elements and compounds behave differently because they have different properties and react differently
give 2 examples of chemical changes
sodium + chlorine=table salt

hydrogen + oxygen+carbon dioxide
which group of elements is used to make semiconductors
metalloids
give an example of a solid solution ans a gas solution
solid-ice
gas-air
name 5 elements that are stable enough to be found as a pure element
gold, silver, copper, helium, neon, argon, krypton, xenon, radon
give 2 examples of physical changes
melting wax

breaking rock apart
name 3 elements that are nonmetals
sulfur
bromine
neon
how are metals, nonmetals, and metalloids different
metals:shiny, good conductors, ductile, malleable
nonmetals:dull, poor conductors, brittle
metalloids:both metal and nonmetal properties
explain the ways to tell the difference between a chemical and physical change
chemical:a new substance is formed, difficult to change back
physical: the smae substance is still there, easier to change back to what you started with
name 3 elements that are metals
lead
copper
tin
name 3 elements that are metalloids
silicon
antimony
boron
what is the chemical reaction for biurning magnesium
there is a bright white light(this forms magnesium oxide)
what is a solvent
sunstance in which the solute is dissolved
explain how to make a concentrated, dilute, and saturated sugar solution
concentrated-more solute, a lot
dilute-less solute, a little
satureated-holding as much as it can
what is an alloy?
what are the parts of a yellow gold alloy?
solid metal solutions

copper and silver
why can't the solute be filtered out of a solution?
they are so small they don't scatter light
what is a mixture
a combination of 2 or more substances that are not chemically combined
name 3 ways to make some salt dissolve faster in water
mixing, heating, crushing
what happens during electrolysis of water
it seperates into hydrogen and oxygen
how do we know that water is H2O and not something else
there are 2 hydrogen particles for every 1 oxygen particle
name a compound that contains the element carbon
carbon dioxide(CO2)
how could you seperate and iron compound(that doesn't siolve in water) from sugar
-mix with water so the sugar will disolve
-filter to trap the iron
-evaporate the water by heating
how could you seperate the parets of a suspension
passing through a filter so the liquid/gas goes through, but the solid is trapped
what is true about the elements in each column of the periodic table
they have similar properties and characteristics
arrange from coldest to hottest: plasma, liquid, gas, solid
solid
liquid
gas
plasma
what group of plants remove nitrogen from the air and make it into a form animals can use? what other organism is involved with this process? what do animals use the nitrogen to make?
pea plant, bacteria, proteins