Reactivity & Chemical Bonding
Chemical Behavior & Oxidation States
Hydrogen is a versatile reducing agent that burns vigorously in air/oxygen to produce pure water with high energy density.
Z = 1Reactive Nonmetal
Launch 3D Atom & Orbitals LabHydrogen
H
Standard Atomic Mass: 1.008 u
Period 1Group 1S-Block
Chemical Specimen/H
Concentric Electron Shells1 Energy Levels
n=1: 1e⁻
Scientific Monograph • Reactive Nonmetal
3D Atom SimulatorHydrogen (H) Scientific Profile
Hydrogen is the simplest, lightest, and most abundant chemical element in the universe, constituting roughly 75% of all baryonic mass. It acts as the primary stellar fuel and the elemental backbone of water and organic molecules.
Interactive Virtual Labs Available for Hydrogen
3D Orbitals & Valence Lab
Simulate concentric quantum energy levels, observe valence electron spins, and examine live atomic clouds in full 3D.
Electronic Configuration Lab
Experiment with Aufbau subshell ordering, explore orbital occupancy, and analyze quantum configuration exceptions.
Electron Config
1s¹
Electronegativity
2.2 Pauling
Year Discovered
1766
Orbital Shells
1 Principal Levels
Orbital Block
s-block orbital
Group / Period
G: 1 • P: 1
Etymology & Discovery History
Name OriginGreek 'hydro' + 'genes'
Literal MeaningWater-former
Discovery HubDiscovered in London, UK (1766)
Technological Utility
Industrial & Energy Applications
Used in ammonia synthesis (Haber process), clean fuel cells, petroleum hydrocracking, and liquid rocket propellant.
Biological Role
Biomedical Profile & Toxicity
Hydrogen is present in every living cell, forming water (60% of human weight) and generating the proton motive force that drives ATP synthase.
Geochemistry & Abundance
Cosmic & Terrestrial Occurrence
Elements like Hydrogen are synthesized through stellar nucleosynthesis and supernovae r-processes. On Earth, Hydrogen is concentrated in specific ore deposits or synthesized in nuclear accelerators.
Frequently Asked Questions about Hydrogen
Q
What are the key physical and atomic properties of Hydrogen?
Hydrogen (H) has an atomic number of 1 and a standard atomic mass of 1.008 u. It is positioned in Period 1, Group 1, in the S-block, and is classified within the Reactive Nonmetal category.
Q
What is the electron configuration of Hydrogen?
The ground-state electron configuration of Hydrogen is 1s¹. Its 1 electrons are distributed across 1 principal energy levels (1).
Q
Why does Hydrogen exhibit an electron configuration exception?
Hydrogen follows standard Aufbau principle orbital filling. Transition metals and heavy elements optimize their shell filling based on subshell exchange energy and electrostatic stability.
Q
What are the primary commercial and laboratory uses of Hydrogen?
Used in ammonia synthesis (Haber process), clean fuel cells, petroleum hydrocracking, and liquid rocket propellant.