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7H Atoms E Compounds

Key words

TermDefinition
Chemical reaction A change where new substances are formed
Physical reaction A change where no new substances are formed
Property Description of a material
Atom Small unit of matter
Compound Two or more different atoms bonded together (ionic or covalent bond)
Element A certain type of atom
Molecule Two or more atoms bonded together in a covalent bond (sharing electrons)
Formula unit Two or more different atoms bonded together in an ionic bond (+ve and -ve)
Periodic Table The list of elements
Pure A single element or compound (not a mixture)
Crust The thin solid layer on the surface of the Earth
Recycle Reprocess a material to make a new object
Brittle Does not bend but breaks
Conductor of heat Allows heat to pass through
Conductor of electricity Allows electrons to pass through
Flexible Can bend without breaking
Malleable Can be beaten and bend into shape
Ductile Can be drawn into a wire
Magnetic Attracted to a magnet
Metal Lose electrons to obtain a full outer shell
Non-metal Gain electrons to obtain a full outer shell
Bond A force that joins atoms together
Metal ore Rocks that contain metal compounds
Oxide Chemical bonded to oxygen
Carbonate Chemical bonded to CO32-
Decompose Break down to simpler substances
Products Substances formed in a chemical reaction
Reactants Substances used in a chemical reaction
Thermal decomposition Break down into simpler substances by heat
Word equations A chemical equation with words only and no chemical symbols
Created by: andrewweng0406
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