1) All matter, essentially 2) Baasics 3) Basic building material 4) Basic matter 5) Basic units 6) Basic units of matter 7) Benzene ring sextet 8) Bits 9) Bits in a smasher 10) Bits in bonds 11) Bits of matter 12) Bitty bits 13) Bohr studied them 14) Bohr theory subjects 15) Bond holdings 16) Buckminsterfullerene has 60 1) Bits 2) Ions 
The smallest parts of an element - such as hydrogen or oxygen.
Minute particles that are the basic building blocks of all chemical elements and thus all matter.
Composite particles of protons, neutrons and electrons. The smallest part of a substance that can take part in a chemical reaction. Click here for more information
Composite particles of protons, neutrons and electrons
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the smallest particle of any element that has all the properties of that element
the smallest building blocks of all matter