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44 Cards in this Set

  • Front
  • Back
anything that takes up space and has weight
matter
amount of matter that makes up an object
mass
measure of the pull of gravity
weight
amount of matter in one unit of volume
density
tiny particles of which all matter is composed
atoms
tiny, extremely dense core at the center of an atom
nucleus
tiny particles that swarm at tremendous speeds around the core of an atom
electrons
metric unit used to measure an objects mass
gram
two particle that make up a nucleus
protons and neutrons
most metals are
solid
densest of the common metals
lead
semimetal that is used to make computer chips
silicon
only metal that is liquid at room temperature
mercury
element that is the basic building block of all the compounds
carbon
very hard metal which is an important ingredient in stainless steel
nickel
halogen that is added to toothpaste and drinking water
fluorine
halogen that is useful as a bleach and kills germs
chlorine
halogen that is added to table salt
iodine
colorless, odorless gas which makes up 78% of earth's atmosphere
nitrogen
highly reactive elements that tend to form compounds with alkali and alkaline earth metals
halogens
the simplest kind of atom with one proton and one electron
hydrogen
formed by electrons that are in orbit the same distance from the nucleus
shell
number of protons an atom has
atomic number
formed by electrons zooming around the nucleus
electron cloud
lacking an electrical charge
neutral
most abundant element at the surface of the earth
oxygen
study of what srbstances are make of and how one can be changed into another
chemistry
organized arrangement of all known elements
periodic table of the elements
elements which do not combine with anything else except under unusual circumstances
noble gases
two or more atoms firmly bound together
molecule
instead of melting when heated, iodine does this
sublimes
proton has what kind of charge
positive
an atom with equal protons and neutrons
neutral
two electrons will do this to each other
repel
a substance that is composed of only one type of atom
element
one or more types of atoms bonded togerther
compound
Two objects that have the same volume but different densities, which weighs more?
the more dense object
weight of an object changes from
place to place
the three main groups of elements
metals, nonmetals, and semimetals
A compound made of charged atoms is a ___.
ionic compound
hardest of all known materials
diamond
compound made of molecules
molecular compound
process in which atoms of elements or compounds are rearranged to form new substances
chemical reaction
rapid reaction of any substance with oxygen
combustion