Interactive Atom Builder
Construct atoms and ions for the first 20 elements - complete challenges to test your knowledge
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Target Achieved!
Protons (p⁺) 1
Neutrons (n⁰) 0
Electrons (e⁻) 1
H - Hydrogen
Neutral Atom
Common Isotope
Atomic Number (Z)1
Mass Number (A)1
Net Charge0
Electronic Structure1
Element Properties
Atomic Radius
53 pm
Electronegativity
2.20
Common Compounds
H₂O, CH₄, NH₃