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The top documents tagged [helium atomic number]
The Elements Hydrogen HeLi…. Tnx Joe Keola KH6BFZ for starting me out on this! 73 (no, this is not Joe) Менделеев Жить!
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section 2, chapter 2
1.541 views
PRACTICE DRAWING ATOMS. DRAWING ATOMS RULES PROTONS = Atomic number ELECTRONS = Atomic number NEUTRONS = mass number – atomic number 1 st level can hold
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Chemistry Basic introduction to atoms, ions and bonding
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