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19 terms

Atoms, Elements, and Compounds

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atom
the smallest particle into which an element can be divided and still have the properties of that element; basic building block of matter
element
a substance made up of one kind of atom
compound
matter made of two or more elements, has different properties from the elements it is made of
property
a quality or power belonging specially to something
molecule
the smallest particle of a substance that still has the properties of that substance
matter
the material that all objects and substances are made of; anything thas has mass and takes up space
mass
amount of matter in something; measured in grams
volume
amount of space an object or substance takes up
observation
using senses to gather information
inference
drawing a conclusion using prior knowledge to make sense of our observations
liquid
no definite shape, definite volume, not tightly packed, move about freely, slide over each other
gas
no definite shape or volume, far apart, bounce off each other, move rapidly and randomly
solid
definite shape and volume, attracted to each other, held tightly together, movement is limited, vibrate only
water molecule
an example of a compound
hydrogen and oxygen
examples of elements
nucleus
Chemistry: center of an atom, made up of protons and neutrons
neutron
in an atom, particle with a neutral charge; located in the nucleus
proton
positively charged particle located in the nucleus of an atom
electron
negatively charged particle found outside the nucleus of an atom