Atoms - ______ are tiny particles that all matter is made of., Molecules - ______ are groups of atoms connected together in a particular way., Substance - A ______ is a group of molecules with specific properties., Property - An example of a ______ is the color or smell of a substance., Mixture - When two or more substances are combined, this is a ______., Protons - ______ have a positive charge., Neutrons - ______ are neutral., Electrons - ______ have a negative charge., Positive - Protons have a ______ charge., Negative - Electrons have a ______ charge., Charges - Protons and electrons have different ______., Observed - A property is something that can be ______ about a substance., Reaction - A ______ is a process that results in a physical or chemical change., Valence - The ______ shell is the outer most part of an atom., Electron - The ______ shell contains electrons., Nucleus - The ______ contains protons and neutrons., Mass - The atomic ______ is equal to the number of protons and neutrons in an atom.., Number - The atomic ______ is equal to the number of protons in an atom., Element - A substance made up of only one type of atom.,

Atoms and Elements

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