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the atomic number of barium is 56. What do you know about the subatomic particles in an atom of this element ?
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the atomic number of barium is 56. What do you know about the subatomic particles in an atom of this element ?

User Ramesh Kanjinghat
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you definitely know that is has 56 protons and 56 electrons because atomic number is proton number and protons=electrons
User DuTr
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