If you're a student looking to revise chemistry fast — understanding SI units is non-negotiable. These standardized units form the foundation of scientific communication across the globe.
In this guide, you'll get a clean and simple SI Units Table tailored for chemistry learners, plus examples and bonus FAQs.
🔬 What Are SI Units in Chemistry?
SI (International System of Units) is the globally accepted metric system used in science. Chemists use these units to measure everything from the mass of substances to energy, pressure, and concentration — ensuring accuracy in labs and reports.
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| All SI Units Table in Chemistry (With Examples) |
📘Chemistry SI Units Table (With Examples)
| Measured Quantity | SI Unit | Symbol | Use in Chemistry |
|---|---|---|---|
| Length | meter | m | Measuring molecule or bond lengths |
| Mass | kilogram | kg | Quantity of a chemical sample |
| Time | second | s | Duration of reactions |
| Temperature | kelvin | K | Thermodynamic calculations |
| Amount of Substance | mole | mol | Counting atoms or molecules |
| Electric Current | ampere | A | Used in electrochemistry |
| Luminous Intensity | candela | cd | Photometry (rare in chemistry) |
| Volume | cubic meter | m³ | Volume of gases or solutions |
| Density | kg per cubic meter | kg/m³ | Mass per unit volume |
| Concentration | mol per cubic meter | mol/m³ | Molar concentration |
| Energy | joule | J | Heat exchange, enthalpy |
| Pressure | pascal | Pa | Gas laws and pressure |
| Frequency | hertz | Hz | Spectroscopic data |
| Electric Charge | coulomb | C | Charge during electrolysis |
| Power | watt | W | Rate of energy transfer |
| Voltage | volt | V | Potential difference in cells |
| Catalytic Activity | katal | kat | Enzyme or catalyst efficiency |
❓ Frequently Asked Questions (FAQs)
🔹 What are SI units used for in chemistry?
They’re used to standardize measurements like temperature, energy, and mass. This makes experiments and results consistent worldwide.
🔹 Is mole an SI unit?
Yes! The mole (mol) is the SI unit for amount of substance, representing 6.022 × 1023 particles.
🔹 Why is kelvin used instead of Celsius?
Kelvin is the absolute temperature scale, essential for thermodynamic calculations.
🔹 What unit is used for chemical concentration?
The SI unit is mol/m³, but mol/L (Molarity) is commonly used in practical applications.
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