We're going to say here that the international system of units, SI, is related to the metric system, and it comes with 6 base units. Now, when it comes to these 6 base units, let's take a look. We have our physical quantity, and each of these physical quantities is attached to an SI base unit. This SI base unit name has a symbol. So, when it comes to mass, the SI base name is kilogram, and its symbol is kg. Okay? So, the SI base unit for mass is kilograms. Next, we have length. Length would be meters, which is abbreviated as m. Time would be seconds, which is abbreviated as just s. Temperature. The SI unit for temperature is kelvin, which is abbreviated as K, capital K. The amount of a substance, so you need to familiarize yourself with this particular term in terms of chemistry. The amount of the substance is the mole and its symbol is mol. So we just remove the e. Now, when you're doing calculations with moles later on in chemistry, you'll see them use either the full name or the symbol name. Okay? So just remember they're the same thing. Now for volume here, you'll see that there are 2 spots. That's because the top one is the SI base unit that we use, but you'll find time and time again that you'll not see the SI base unit used for volume, instead, you'll see the metric one. So the SI base unit for volume is going to be cubic meters, which is m3. And here, the metric of that is liters. You'll see liters more often than you will see cubic meters. And the symbol for liters is just a capital L. So here we have our 6 base units, as well as 1 metric unit. In terms of volume, the metric unit of liters is oftentimes used more than the SI unit of cubic meters.
- 1. The Chemical World10m
- 2. Measurement and Problem Solving2h 25m
- 3. Matter and Energy2h 15m
- Classification of Matter18m
- States of Matter8m
- Physical & Chemical Changes19m
- Chemical Properties8m
- Physical Properties5m
- Temperature (Simplified)9m
- Law of Conservation of Mass5m
- Nature of Energy5m
- First Law of Thermodynamics7m
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- Heat Capacity16m
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- Intensive vs. Extensive Properties13m
- 4. Atoms and Elements2h 33m
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- Isotopes17m
- Ions (Simplified)22m
- Atomic Mass (Simplified)17m
- Periodic Table: Element Symbols6m
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- Atomic Theory9m
- Rutherford Gold Foil Experiment9m
- 5. Molecules and Compounds1h 50m
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- Molecular Models4m
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- 6. Chemical Composition1h 23m
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- 9. Electrons in Atoms and the Periodic Table2h 32m
- Wavelength and Frequency (Simplified)5m
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- Bohr Model (Simplified)9m
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- Electronic Structure4m
- Electronic Structure: Shells5m
- Electronic Structure: Subshells4m
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- Electronic Structure: Number of Electrons4m
- The Electron Configuration (Simplified)20m
- The Electron Configuration: Condensed4m
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- Periodic Trend: Metallic Character4m
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- Periodic Trend: Electron Affinity (Simplified)7m
- Electron Arrangements5m
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- 10. Chemical Bonding2h 10m
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- 11 Gases2h 15m
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- 15. Chemical Equilibrium1h 27m
- 16. Oxidation and Reduction1h 33m
- 17. Radioactivity and Nuclear Chemistry53m
SI Units (Simplified) - Online Tutor, Practice Problems & Exam Prep
The International System of Units (SI) comprises six base units essential for scientific measurements. These include the kilogram (kg) for mass, meter (m) for length, second (s) for time, kelvin (K) for temperature, mole (mol) for the amount of substance, and cubic meter (m³) for volume, though liters (L) are more commonly used. Understanding these units is crucial for accurate calculations in chemistry and physics, facilitating effective communication of scientific data and enhancing comprehension of concepts like molarity and density.
The International System of Units (SI) represents the modern form of the metric system.
The Major SI Units
SI Units (Simplified) Concept 1
Video transcript
SI Units (Simplified) Example 1
Video transcript
Which of the following values is given with SI units? So here we have 1.25 × 104 minutes, 6.82 × 10-3 milligrams, 25.6 °C, and 101.3 seconds. Alright. So, minutes is a unit of time. We know the SI unit for time is seconds, not minutes. Next, milligrams is our units for mass, but we know kilograms is the SI unit for mass. Celsius, units for temperature, but we know temperature should be in Kelvin when we're dealing with SI units. Here, out of all our options, option d is the correct choice. Seconds is an SI base unit.
Which of the following represents volume in SI units?
Convert 12 minutes into acceptable SI units.
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