| Formula / Notation | Ga |
|---|---|
| CAS Number | 7440-55-3 |
| Molecular Weight | 69.72 |
| Melting Point | 29.8 |
| Boiling Point | 2229.0 |
| Density | 5.91 |
| Solubility | Insoluble in water |
| Appearance | Soft, silvery metal; liquid just above room temperature |
| Also Known As | Ga, gallium metal |
| Category | Elements |
What is Gallium?
Gallium is a soft, silvery metal, atomic number 31. Famous for melting just above room temperature (29.8 C) - it melts in the palm of your hand. Gallium arsenide (GaAs) and gallium nitride (GaN) are key semiconductors for LEDs, lasers, and high-frequency electronics.
Formula & Notation
IUPAC Name: Gallium
Other Names / Synonyms: Ga, gallium metal
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 29.8 |
| Boiling Point | 2229.0 |
| Density | 5.91 |
| Molecular Weight | 69.72 |
| Solubility | Insoluble in water |
| Appearance | Soft, silvery metal; liquid just above room temperature |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Gallium is a soft, silvery metal, atomic number 31. Famous for melting just above room temperature (29.8 C) - it melts in the palm of your hand. Gallium arsenide (GaAs) and gallium nitride (GaN) are key semiconductors for LEDs, lasers, and high-frequency electronics.
GaAs semiconductor (solar cells, high-speed electronics, microwave devices). GaN LEDs and laser diodes (blue LEDs - Nobel Prize 2014). High-temperature thermometers. Gallium alloys (low melting). Pharmaceuticals (Ga-67 imaging agent). MRI contrast agents.
Gallium metal: low acute toxicity. Skin contact with liquid gallium: mildly irritating. Gallium compounds: low to moderate toxicity. GaAs: potentially toxic (contains arsenic) - handle with care. Gallium alloys: may wet and corrode aluminium aircraft parts.
The formula or notation for Gallium is: Ga