1
H
Hydrogen
1.008
Hydrogen
NonmetalAtomic #1
Atomic Mass1.008 u
Group1
Period1
State (room)Gas
Electron Config1s¹
📖 About this Element
Hydrogen is the lightest and most abundant element in the universe. It makes up about 75% of all normal matter by mass. On Earth, hydrogen is mostly found in water (H₂O). It is a colorless, odorless gas that burns easily.
⚗️ Key Fact
Click any element on the table below to explore it. Use the filters to highlight element families.
Element Families — Color Key
Hydrogen1
Alkali Metals6
Alkaline Earth Metals6
Transition Metals40
Post-Transition Metals7
Metalloids7
Reactive Nonmetals7
Halogens6
Noble Gases7
Lanthanides15
Actinides15
⚙️ Metals vs. Nonmetals vs. Metalloids
⚙️ Metals
Shiny, lustrous appearance
Good conductors of heat and electricity
Malleable — can be hammered flat
Ductile — can be drawn into wire
Usually solid at room temperature
Tend to lose electrons in reactions (cations)
Examples: Iron, Copper, Gold, Sodium
🌿 Nonmetals
Dull appearance (not shiny)
Poor conductors (insulators)
Brittle when solid — breaks easily
Cannot be drawn into wire
Can be gas, liquid, or solid at room temp
Tend to gain electrons in reactions (anions)
Examples: Oxygen, Carbon, Sulfur, Chlorine
🔶 Metalloids
Properties of both metals and nonmetals
Semiconductors — conduct under some conditions
Found along the "staircase" on the table
Can be shiny or dull
All solid at room temperature
Used in computer chips (Silicon!)
Examples: Silicon, Boron, Arsenic