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ByerlyCh.11vocab

Stack #207155

QuestionAnswer
matter anything that has volume and mass
mass the amount of matter something is made of
space A quantity or portion of extension
classification a division of organisms into groups, or classes, based on specific characteristics
heterogeneous composed of dissimilar components
indirect evidence evidence that provides a basis of influence for something else
element a pure substance that cannot be separated or broken down into simpler by physical or chemical means
atom the smallest particle into which an element can be divided and still be the same substance
subatomic particle a particle smaller than an atom
proton a positively charged particle of the nucleus
neutron a subatomic particle that has no charge and that is located in the nucleus of an atom
electron a negatively charged particle found in all atoms
nucleus the tiny extremely dense positively charged region in the center of an atom/made up of proton and neutrons
atomic number the number of protons in the nucleus of an atom
mass number the sum of proton and neutrons in an atom
atomic mass the weighted average of the masses of all the naturally occurring isotopes of an element
electron cloud the regions around the nucleus of an atom where electrons are likely to be found
energy levels A definite value of energy possible for an atom
ion a charged particle that forms during chemical changes when one ore more valence electrons transfer from one atom to another
isotopes atoms that have the same numbers of protons but have different numbers of neutrons
amu(atomic mass unit) a unit of mass that describes the mass of an atom or molecule; it is exactly 1/12 of the mass of a carbon atom with mass number 12 (symbol, ___)
homogeneous describes something that has a uniform structure or composition throughout
Created by: eqm
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