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Biology 9 Online
sky18:

the smallest unit of an element compound 2. the path surrounding the nucleus of an atom in which electrons are normally located shell 3. the number of protons in the nucleus of the atom proton 4. a pure substance where atoms of two or more elements are chemically bonded to one another neutron 5. the positively charged center of an atom atomic mass 6. exists in orbit around the nucleus of an atom and carries a negative charge electron 7. the smallest unit of a pure substance that consists of two or more atoms held together by a chemical bond atom 8. the mass of an element molecule 9. a subatomic particle that carries no charge diatomic 10. containing two atoms atomic number 11. a subatomic particle with a positive charge nucleus

Ninjoy:

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