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mixture of atoms.Nitrogen is a molecule. ewis dot structure has 20 elements

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A compound is a mixture of elements.An example of a compound is H2O.Lewis dot structure has 20 elements

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The negatively charged part on the atom and it circles the nucleus and has the same mass as a proton does.

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Neutrons are the neutrally charged part of atom that are like the proton located in the nucleus of the atom. and the mass is the located at the the atomic mass on an element

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protons are the positively charged part of the atom that are located in the nucleus.And there mass depends on the atomic number

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atoms can be positively charged, negativly charged or neutrally charged