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Periodic Table H= Hydrogen Hydrogen's atomic number is Hydrogen's Symbol is Hydrogen's atomic mass is Hydrogen has... How many electrons? How many Protons? He= Helium 4.0026 Helium He 2 Helium's atomic number is Helium's Symbol is Helium's atomic mass is Helium has... How many Protons? How many nuetrons? How many electrons? Li= Lithium Lithium 6.941 Li 3 Lithium's atomic number is Lithium's Symbol is Lithium's atomic mass is Lithium has... How many Protons? How many nuetrons? How many electrons? |