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Biology Unit 2 test

9/18/12 test

QuestionAnswer
anything that occupies space and has mass matter
amount of space occupied by matter volume
amount of matter in an abject mass
ratio of the matter's mass to its volume density
the form in whcih matter exists physical state
physical properties of matter size, shape, texture, hardness, volume, mass, density, physical state
chemical properties of matter ability to burn, ability to rust, ability to decompose
the basic unit of matter; comes from Greek word atomos, which means "unable to cut" atom
subatomic particles of an atom proton, neutron, and electron
particle with relatively large mass and positive charge proton
about the same mass as a proton and no charge neutron
relatively small mass and a negative charge; move around outside of the neucleus electron
the center of the atom nucleus
pure subtance that consists entirely of one type of atom element
amount of protons in an element atomic number
number of protons plus the number of neutrons mass number
atoms of the same element that differ in the number of neutrons they contain isotopes
the weighted averages of the masses of an element's isotopes atomic mass
substance formed by the chemical combination by two or more elements in definite proportion compound
main types of bonds ionic bond and covalent bonds
chemical bond formed when one or more electrons are transferred from one atom to another ionic bond
type of bond between in which the electrons are shared covalent bodn
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